725662135673766 has 24 divisors (see below), whose sum is σ = 1572269066738760. Its totient is φ = 241887208386816.

The previous prime is 725662135673743. The next prime is 725662135673807. The reversal of 725662135673766 is 667376531266527.

It is a happy number.

725662135673766 is a `hidden beast` number, since 7 + 2 + 5 + 6 + 6 + 21 + 3 + 567 + 37 + 6 + 6 = 666.

It is a super-2 number, since 2×725662135673766² (a number of 31 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 725662135673694 and 725662135673703.

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, 13584966 + ... + 40445958.

It is an arithmetic number, because the mean of its divisors is an integer number (65511211114115).

Almost surely, 2^{725662135673766} is an apocalyptic number.

725662135673766 is an abundant number, since it is smaller than the sum of its proper divisors (846606931064994).

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

725662135673766 is a wasteful number, since it uses less digits than its factorization.

725662135673766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28361860 (or 28361857 counting only the distinct ones).

The product of its digits is 2400451200, while the sum is 72.

The spelling of 725662135673766 in words is "seven hundred twenty-five trillion, six hundred sixty-two billion, one hundred thirty-five million, six hundred seventy-three thousand, seven hundred sixty-six".