77179968 has 42 divisors (see below), whose sum is σ = 221224094. Its totient is φ = 25726464.

The previous prime is 77179951. The next prime is 77179979. The reversal of 77179968 is 86997177.

It can be written as a sum of positive squares in only one way, i.e., 63872064 + 13307904 = 7992^2 + 3648^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 66421 + ... + 67572.

Almost surely, 2^77179968 is an apocalyptic number.

It is an amenable number.

77179968 is an abundant number, since it is smaller than the sum of its proper divisors (144044126).

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

77179968 is a wasteful number, since it uses less digits than its factorization.

77179968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134011 (or 133998 counting only the distinct ones).

The product of its digits is 1333584, while the sum is 54.

The square root of 77179968 is about 8785.2130309970. The cubic root of 77179968 is about 425.7632752098.

The spelling of 77179968 in words is "seventy-seven million, one hundred seventy-nine thousand, nine hundred sixty-eight".