77164725 has 48 divisors (see below), whose sum is σ = 140508864. Its totient is φ = 37364800.

The previous prime is 77164709. The next prime is 77164729. The reversal of 77164725 is 52746177.

It is not a de Polignac number, because 77164725 - 2⁴ = 77164709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77164729) 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 47 ways as a sum of consecutive naturals, for example, 99439 + ... + 100211.

It is an arithmetic number, because the mean of its divisors is an integer number (2927268).

Almost surely, 2^77164725 is an apocalyptic number.

77164725 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

77164725 is a deficient number, since it is larger than the sum of its proper divisors (63344139).

77164725 is a wasteful number, since it uses less digits than its factorization.

77164725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 819 (or 792 counting only the distinct ones).

The product of its digits is 82320, while the sum is 39.

The square root of 77164725 is about 8784.3454508575. The cubic root of 77164725 is about 425.7352440290.

The spelling of 77164725 in words is "seventy-seven million, one hundred sixty-four thousand, seven hundred twenty-five".