77418680 has 64 divisors (see below), whose sum is σ = 185574240. Its totient is φ = 28966912.

The previous prime is 77418647. The next prime is 77418683. The reversal of 77418680 is 8681477.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77418683) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 174539 + ... + 174981.

Almost surely, 2^77418680 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77418680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92787120).

77418680 is an abundant number, since it is smaller than the sum of its proper divisors (108155560).

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

77418680 is a wasteful number, since it uses less digits than its factorization.

77418680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728 (or 724 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 41.

The square root of 77418680 is about 8798.7885529771. The cubic root of 77418680 is about 426.2017750012.

The spelling of 77418680 in words is "seventy-seven million, four hundred eighteen thousand, six hundred eighty".