77680602 has 12 divisors (see below), whose sum is σ = 168308010. Its totient is φ = 25893528.

The previous prime is 77680601. The next prime is 77680651. The reversal of 77680602 is 20608677.

It can be written as a sum of positive squares in only one way, i.e., 66928761 + 10751841 = 8181^2 + 3279^2 .

It is not an unprimeable number, because it can be changed into a prime (77680601) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2157777 + ... + 2157812.

Almost surely, 2^77680602 is an apocalyptic number.

77680602 is an abundant number, since it is smaller than the sum of its proper divisors (90627408).

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

77680602 is a wasteful number, since it uses less digits than its factorization.

77680602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4315597 (or 4315594 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 77680602 is about 8813.6599662115. The cubic root of 77680602 is about 426.6818743223.

The spelling of 77680602 in words is "seventy-seven million, six hundred eighty thousand, six hundred two".