662551840 has 96 divisors (see below), whose sum is σ = 1629089280. Its totient is φ = 254626560.

The previous prime is 662551837. The next prime is 662551843. The reversal of 662551840 is 48155266.

It is an interprime number because it is at equal distance from previous prime (662551837) and next prime (662551843).

It is a self number, because there is not a number n which added to its sum of digits gives 662551840.

It is not an unprimeable number, because it can be changed into a prime (662551843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4766491 + ... + 4766629.

It is an arithmetic number, because the mean of its divisors is an integer number (16969680).

Almost surely, 2^662551840 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 662551840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (814544640).

662551840 is an abundant number, since it is smaller than the sum of its proper divisors (966537440).

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

662551840 is an equidigital number, since it uses as much as digits as its factorization.

662551840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247 (or 177 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 37.

The square root of 662551840 is about 25740.0823619506. The cubic root of 662551840 is about 871.7794380860.

The spelling of 662551840 in words is "six hundred sixty-two million, five hundred fifty-one thousand, eight hundred forty".