77776025 has 24 divisors (see below), whose sum is σ = 102954720. Its totient is φ = 58112640.

The previous prime is 77776019. The next prime is 77776031. The reversal of 77776025 is 52067777.

It is an interprime number because it is at equal distance from previous prime (77776019) and next prime (77776031).

It is not a de Polignac number, because 77776025 - 2⁸ = 77775769 is a prime.

It is a super-2 number, since 2×77776025² = 12098220129601250, which contains 22 as substring.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33554 + ... + 35796.

It is an arithmetic number, because the mean of its divisors is an integer number (4289780).

Almost surely, 2^77776025 is an apocalyptic number.

It is an amenable number.

77776025 is a deficient number, since it is larger than the sum of its proper divisors (25178695).

77776025 is a wasteful number, since it uses less digits than its factorization.

77776025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2345 (or 2340 counting only the distinct ones).

The product of its (nonzero) digits is 144060, while the sum is 41.

The square root of 77776025 is about 8819.0716631627. The cubic root of 77776025 is about 426.8565151088.

The spelling of 77776025 in words is "seventy-seven million, seven hundred seventy-six thousand, twenty-five".