77669725 has 48 divisors (see below), whose sum is σ = 115548160. Its totient is φ = 50673600.

The previous prime is 77669723. The next prime is 77669729. The reversal of 77669725 is 52796677.

It is a happy number.

It is not a de Polignac number, because 77669725 - 2¹ = 77669723 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77669723) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 558706 + ... + 558844.

Almost surely, 2^77669725 is an apocalyptic number.

It is an amenable number.

77669725 is a deficient number, since it is larger than the sum of its proper divisors (37878435).

77669725 is a wasteful number, since it uses less digits than its factorization.

77669725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290 (or 285 counting only the distinct ones).

The product of its digits is 1111320, while the sum is 49.

The square root of 77669725 is about 8813.0428910791. The cubic root of 77669725 is about 426.6619584306.

The spelling of 77669725 in words is "seventy-seven million, six hundred sixty-nine thousand, seven hundred twenty-five".