65661154525 has 12 divisors (see below), whose sum is σ = 81424029600. Its totient is φ = 52526215280.

The previous prime is 65661154513. The next prime is 65661154553. The reversal of 65661154525 is 52545116656.

It is a happy number.

It is not a de Polignac number, because 65661154525 - 2⁷ = 65661154397 is a prime.

It is a super-2 number, since 2×65661154525² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 530496 + ... + 642454.

It is an arithmetic number, because the mean of its divisors is an integer number (6785335800).

Almost surely, 2^65661154525 is an apocalyptic number.

It is an amenable number.

65661154525 is a deficient number, since it is larger than the sum of its proper divisors (15762875075).

65661154525 is a wasteful number, since it uses less digits than its factorization.

65661154525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135428 (or 135423 counting only the distinct ones).

The product of its digits is 1080000, while the sum is 46.

The spelling of 65661154525 in words is "sixty-five billion, six hundred sixty-one million, one hundred fifty-four thousand, five hundred twenty-five".