77870516 has 12 divisors (see below), whose sum is σ = 136537632. Its totient is φ = 38859768.

The previous prime is 77870503. The next prime is 77870561. The reversal of 77870516 is 61507877.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16520 + ... + 20703.

It is an arithmetic number, because the mean of its divisors is an integer number (11378136).

Almost surely, 2^77870516 is an apocalyptic number.

It is an amenable number.

77870516 is a deficient number, since it is larger than the sum of its proper divisors (58667116).

77870516 is a wasteful number, since it uses less digits than its factorization.

77870516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37750 (or 37748 counting only the distinct ones).

The product of its (nonzero) digits is 82320, while the sum is 41.

The square root of 77870516 is about 8824.4272335376. The cubic root of 77870516 is about 427.0293094709.

The spelling of 77870516 in words is "seventy-seven million, eight hundred seventy thousand, five hundred sixteen".