725660051 has 4 divisors (see below), whose sum is σ = 757210512. Its totient is φ = 694109592.

The previous prime is 725660041. The next prime is 725660081. The reversal of 725660051 is 150066527.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 725660051 - 2¹⁰ = 725659027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (725660041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15775196 + ... + 15775241.

It is an arithmetic number, because the mean of its divisors is an integer number (189302628).

Almost surely, 2^725660051 is an apocalyptic number.

725660051 is a deficient number, since it is larger than the sum of its proper divisors (31550461).

725660051 is a wasteful number, since it uses less digits than its factorization.

725660051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31550460.

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 725660051 is about 26938.0780866045. The cubic root of 725660051 is about 898.6234309730.

The spelling of 725660051 in words is "seven hundred twenty-five million, six hundred sixty thousand, fifty-one".