64680525 has 144 divisors (see below), whose sum is σ = 148859520. Its totient is φ = 27293760.

The previous prime is 64680479. The next prime is 64680533. The reversal of 64680525 is 52508646.

64680525 is a `hidden beast` number, since 646 + 8 + 0 + 5 + 2 + 5 = 666.

It is not a de Polignac number, because 64680525 - 2¹⁰ = 64679501 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 64680525.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 4975419 + ... + 4975431.

Almost surely, 2^64680525 is an apocalyptic number.

64680525 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

64680525 is an abundant number, since it is smaller than the sum of its proper divisors (84178995).

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

64680525 is an equidigital number, since it uses as much as digits as its factorization.

64680525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64 (or 28 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The square root of 64680525 is about 8042.4203446475. The cubic root of 64680525 is about 401.4127647814.

The spelling of 64680525 in words is "sixty-four million, six hundred eighty thousand, five hundred twenty-five".