77620014664 has 32 divisors (see below), whose sum is σ = 145910157120. Its totient is φ = 38710771776.

The previous prime is 77620014629. The next prime is 77620014707. The reversal of 77620014664 is 46641002677.

It is a self number, because there is not a number n which added to its sum of digits gives 77620014664.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5193907 + ... + 5208829.

It is an arithmetic number, because the mean of its divisors is an integer number (4559692410).

Almost surely, 2^77620014664 is an apocalyptic number.

It is an amenable number.

77620014664 is a deficient number, since it is larger than the sum of its proper divisors (68290142456).

77620014664 is a wasteful number, since it uses less digits than its factorization.

77620014664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16549 (or 16545 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 43.

The spelling of 77620014664 in words is "seventy-seven billion, six hundred twenty million, fourteen thousand, six hundred sixty-four".