76706778 has 16 divisors (see below), whose sum is σ = 154904256. Its totient is φ = 25320480.

The previous prime is 76706761. The next prime is 76706783. The reversal of 76706778 is 87760767.

It is a super-2 number, since 2×76706778² = 11767859582282568, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61443 + ... + 62678.

It is an arithmetic number, because the mean of its divisors is an integer number (9681516).

Almost surely, 2^76706778 is an apocalyptic number.

76706778 is an abundant number, since it is smaller than the sum of its proper divisors (78197478).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

76706778 is a wasteful number, since it uses less digits than its factorization.

76706778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124229.

The product of its (nonzero) digits is 691488, while the sum is 48.

The square root of 76706778 is about 8758.2405767369. The cubic root of 76706778 is about 424.8913733917.

The spelling of 76706778 in words is "seventy-six million, seven hundred six thousand, seven hundred seventy-eight".