77069690 has 16 divisors (see below), whose sum is σ = 139242240. Its totient is φ = 30713040.

The previous prime is 77069683. The next prime is 77069731. The reversal of 77069690 is 9696077.

It is a super-2 number, since 2×77069690² = 11879474233392200, 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, 11510 + ... + 16929.

It is an arithmetic number, because the mean of its divisors is an integer number (8702640).

Almost surely, 2^77069690 is an apocalyptic number.

77069690 is a deficient number, since it is larger than the sum of its proper divisors (62172550).

77069690 is a wasteful number, since it uses less digits than its factorization.

77069690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28717.

The product of its (nonzero) digits is 142884, while the sum is 44.

The square root of 77069690 is about 8778.9344455919. The cubic root of 77069690 is about 425.5603956978.

The spelling of 77069690 in words is "seventy-seven million, sixty-nine thousand, six hundred ninety".