77707668 has 24 divisors (see below), whose sum is σ = 181703872. Its totient is φ = 25847424.

The previous prime is 77707667. The next prime is 77707673. The reversal of 77707668 is 86670777.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77707667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 805 + ... + 12492.

Almost surely, 2^77707668 is an apocalyptic number.

It is an amenable number.

77707668 is an abundant number, since it is smaller than the sum of its proper divisors (103996204).

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

77707668 is a wasteful number, since it uses less digits than its factorization.

77707668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13791 (or 13789 counting only the distinct ones).

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

The square root of 77707668 is about 8815.1952899525. The cubic root of 77707668 is about 426.7314243614.

The spelling of 77707668 in words is "seventy-seven million, seven hundred seven thousand, six hundred sixty-eight".