77578068 has 24 divisors (see below), whose sum is σ = 185431680. Its totient is φ = 25228480.

The previous prime is 77578051. The next prime is 77578073. The reversal of 77578068 is 86087577.

It is a super-2 number, since 2×77578068² = 12036713269225248, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78348 + ... + 79331.

It is an arithmetic number, because the mean of its divisors is an integer number (7726320).

Almost surely, 2^77578068 is an apocalyptic number.

It is an amenable number.

77578068 is an abundant number, since it is smaller than the sum of its proper divisors (107853612).

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

77578068 is a wasteful number, since it uses less digits than its factorization.

77578068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157727 (or 157725 counting only the distinct ones).

The product of its (nonzero) digits is 658560, while the sum is 48.

The square root of 77578068 is about 8807.8412792239. The cubic root of 77578068 is about 426.4940596847.

The spelling of 77578068 in words is "seventy-seven million, five hundred seventy-eight thousand, sixty-eight".