77166668 has 12 divisors (see below), whose sum is σ = 137915232. Its totient is φ = 37762320.

The previous prime is 77166667. The next prime is 77166731. The reversal of 77166668 is 86666177.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is not an unprimeable number, because it can be changed into a prime (77166667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 205043 + ... + 205418.

It is an arithmetic number, because the mean of its divisors is an integer number (11492936).

Almost surely, 2^77166668 is an apocalyptic number.

It is an amenable number.

77166668 is a deficient number, since it is larger than the sum of its proper divisors (60748564).

77166668 is a wasteful number, since it uses less digits than its factorization.

77166668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410512 (or 410510 counting only the distinct ones).

The product of its digits is 508032, while the sum is 47.

The square root of 77166668 is about 8784.4560446279. The cubic root of 77166668 is about 425.7388173225.

The spelling of 77166668 in words is "seventy-seven million, one hundred sixty-six thousand, six hundred sixty-eight".