77876725 has 18 divisors (see below), whose sum is σ = 101928930. Its totient is φ = 59015520.

The previous prime is 77876719. The next prime is 77876731. The reversal of 77876725 is 52767877.

It is an interprime number because it is at equal distance from previous prime (77876719) and next prime (77876731).

It can be written as a sum of positive squares in 3 ways, for example, as 11437924 + 66438801 = 3382^2 + 8151^2 .

It is not a de Polignac number, because 77876725 - 2⁵ = 77876693 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4711 + ... + 13339.

Almost surely, 2^77876725 is an apocalyptic number.

It is an amenable number.

77876725 is a deficient number, since it is larger than the sum of its proper divisors (24052205).

77876725 is a wasteful number, since it uses less digits than its factorization.

77876725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8677 (or 8653 counting only the distinct ones).

The product of its digits is 1152480, while the sum is 49.

The square root of 77876725 is about 8824.7790340609. The cubic root of 77876725 is about 427.0406588863.

The spelling of 77876725 in words is "seventy-seven million, eight hundred seventy-six thousand, seven hundred twenty-five".