665151757560 has 128 divisors (see below), whose sum is σ = 2333865888000. Its totient is φ = 168038333568.

The previous prime is 665151757537. The next prime is 665151757561. The reversal of 665151757560 is 65757151566.

665151757560 is a `hidden beast` number, since 6 + 6 + 5 + 1 + 5 + 1 + 7 + 575 + 60 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 665151757497 and 665151757506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665151757561) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16186882 + ... + 16227921.

It is an arithmetic number, because the mean of its divisors is an integer number (18233327250).

Almost surely, 2^665151757560 is an apocalyptic number.

665151757560 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

665151757560 is an abundant number, since it is smaller than the sum of its proper divisors (1668714130440).

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

665151757560 is a wasteful number, since it uses less digits than its factorization.

665151757560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32414842 (or 32414832 counting only the distinct ones).

The product of its (nonzero) digits is 6615000, while the sum is 54.

The spelling of 665151757560 in words is "six hundred sixty-five billion, one hundred fifty-one million, seven hundred fifty-seven thousand, five hundred sixty".