655366740 has 96 divisors (see below), whose sum is σ = 2100639744. Its totient is φ = 149550720.

The previous prime is 655366721. The next prime is 655366759. The reversal of 655366740 is 47663556.

It is an interprime number because it is at equal distance from previous prime (655366721) and next prime (655366759).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 655366692 and 655366701.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 407017 + ... + 408623.

It is an arithmetic number, because the mean of its divisors is an integer number (21881664).

Almost surely, 2^655366740 is an apocalyptic number.

655366740 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 655366740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1050319872).

655366740 is an abundant number, since it is smaller than the sum of its proper divisors (1445273004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

655366740 is a wasteful number, since it uses less digits than its factorization.

655366740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2597 (or 2595 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 42.

The square root of 655366740 is about 25600.1316402865. The cubic root of 655366740 is about 868.6166150304.

The spelling of 655366740 in words is "six hundred fifty-five million, three hundred sixty-six thousand, seven hundred forty".