88661925657 has 12 divisors (see below), whose sum is σ = 131528502820. Its totient is φ = 57510438048.

The previous prime is 88661925629. The next prime is 88661925661. The reversal of 88661925657 is 75652916688.

88661925657 is a `hidden beast` number, since 8 + 8 + 6 + 61 + 9 + 2 + 565 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 75701469321 + 12960456336 = 275139^2 + 113844^2 .

It is a de Polignac number, because none of the positive numbers 2^k-88661925657 is a prime.

It is a super-2 number, since 2×88661925657² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 88661925594 and 88661925603.

It is not an unprimeable number, because it can be changed into a prime (88661920657) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 133125682 + ... + 133126347.

Almost surely, 2^88661925657 is an apocalyptic number.

It is an amenable number.

88661925657 is a deficient number, since it is larger than the sum of its proper divisors (42866577163).

88661925657 is a wasteful number, since it uses less digits than its factorization.

88661925657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266252072 (or 266252069 counting only the distinct ones).

The product of its digits is 43545600, while the sum is 63.

The spelling of 88661925657 in words is "eighty-eight billion, six hundred sixty-one million, nine hundred twenty-five thousand, six hundred fifty-seven".