77625725 has 12 divisors (see below), whose sum is σ = 96375156. Its totient is φ = 62023680.

The previous prime is 77625719. The next prime is 77625727. The reversal of 77625725 is 52752677.

It can be written as a sum of positive squares in 6 ways, for example, as 80089 + 77545636 = 283^2 + 8806^2 .

It is not a de Polignac number, because 77625725 - 2¹⁴ = 77609341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77625727) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27479 + ... + 30171.

It is an arithmetic number, because the mean of its divisors is an integer number (8031263).

Almost surely, 2^77625725 is an apocalyptic number.

It is an amenable number.

77625725 is a deficient number, since it is larger than the sum of its proper divisors (18749431).

77625725 is a wasteful number, since it uses less digits than its factorization.

77625725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3856 (or 3851 counting only the distinct ones).

The product of its digits is 205800, while the sum is 41.

The square root of 77625725 is about 8810.5462373226. The cubic root of 77625725 is about 426.5813750274.

The spelling of 77625725 in words is "seventy-seven million, six hundred twenty-five thousand, seven hundred twenty-five".