77726668 has 12 divisors (see below), whose sum is σ = 136565352. Its totient is φ = 38708000.

The previous prime is 77726653. The next prime is 77726681. The reversal of 77726668 is 86662777.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37705 + ... + 39712.

It is an arithmetic number, because the mean of its divisors is an integer number (11380446).

Almost surely, 2^77726668 is an apocalyptic number.

It is an amenable number.

77726668 is a deficient number, since it is larger than the sum of its proper divisors (58838684).

77726668 is a wasteful number, since it uses less digits than its factorization.

77726668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77672 (or 77670 counting only the distinct ones).

The product of its digits is 1185408, while the sum is 49.

The square root of 77726668 is about 8816.2729086616. The cubic root of 77726668 is about 426.7662010081.

The spelling of 77726668 in words is "seventy-seven million, seven hundred twenty-six thousand, six hundred sixty-eight".