65625510 has 16 divisors (see below), whose sum is σ = 157501296. Its totient is φ = 17500128.

The previous prime is 65625503. The next prime is 65625557. The reversal of 65625510 is 1552656.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 2187517 = 65625510 / (6 + 5 + 6 + 2 + 5 + 5 + 1 + 0).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1093729 + ... + 1093788.

It is an arithmetic number, because the mean of its divisors is an integer number (9843831).

Almost surely, 2^65625510 is an apocalyptic number.

65625510 is an abundant number, since it is smaller than the sum of its proper divisors (91875786).

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

65625510 is a wasteful number, since it uses less digits than its factorization.

65625510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2187527.

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 65625510 is about 8100.9573508321. The cubic root of 65625510 is about 403.3582063906.

The spelling of 65625510 in words is "sixty-five million, six hundred twenty-five thousand, five hundred ten".