77864668 has 24 divisors (see below), whose sum is σ = 155935584. Its totient is φ = 33326400.

The previous prime is 77864663. The next prime is 77864671. The reversal of 77864668 is 86646877.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77864663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28398 + ... + 31018.

It is an arithmetic number, because the mean of its divisors is an integer number (6497316).

Almost surely, 2^77864668 is an apocalyptic number.

It is an amenable number.

77864668 is an abundant number, since it is smaller than the sum of its proper divisors (78070916).

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

77864668 is a wasteful number, since it uses less digits than its factorization.

77864668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3693 (or 3691 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 52.

The square root of 77864668 is about 8824.0958743658. The cubic root of 77864668 is about 427.0186193747.

The spelling of 77864668 in words is "seventy-seven million, eight hundred sixty-four thousand, six hundred sixty-eight".