772799977 has 8 divisors (see below), whose sum is σ = 848842560. Its totient is φ = 700294320.

The previous prime is 772799947. The next prime is 772799981. The reversal of 772799977 is 779997277.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 772799977 - 2⁷ = 772799849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (772799947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 883774 + ... + 884647.

It is an arithmetic number, because the mean of its divisors is an integer number (106105320).

Almost surely, 2^772799977 is an apocalyptic number.

It is an amenable number.

772799977 is a deficient number, since it is larger than the sum of its proper divisors (76042583).

772799977 is a wasteful number, since it uses less digits than its factorization.

772799977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1768463.

The product of its digits is 24504606, while the sum is 64.

The square root of 772799977 is about 27799.2801525507. The cubic root of 772799977 is about 917.6752810512.

The spelling of 772799977 in words is "seven hundred seventy-two million, seven hundred ninety-nine thousand, nine hundred seventy-seven".