76977770 has 16 divisors (see below), whose sum is σ = 140459400. Its totient is φ = 30369024.

The previous prime is 76977767. The next prime is 76977773. The reversal of 76977770 is 7777967.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (76977767) and next prime (76977773).

It can be written as a sum of positive squares in 4 ways, for example, as 60388441 + 16589329 = 7771^2 + 4073^2 .

It is not an unprimeable number, because it can be changed into a prime (76977773) 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 7 ways as a sum of consecutive naturals, for example, 51995 + ... + 53454.

Almost surely, 2^76977770 is an apocalyptic number.

76977770 is a deficient number, since it is larger than the sum of its proper divisors (63481630).

76977770 is a wasteful number, since it uses less digits than its factorization.

76977770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105529.

The product of its (nonzero) digits is 907578, while the sum is 50.

The square root of 76977770 is about 8773.6976241491. The cubic root of 76977770 is about 425.3911416390.

The spelling of 76977770 in words is "seventy-six million, nine hundred seventy-seven thousand, seven hundred seventy".