84977737766 has 16 divisors (see below), whose sum is σ = 136065173760. Its totient is φ = 39685673160.

The previous prime is 84977737763. The next prime is 84977737771. The reversal of 84977737766 is 66773777948.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (71).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 84977737766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84977737763) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15745586 + ... + 15750981.

It is an arithmetic number, because the mean of its divisors is an integer number (8504073360).

Almost surely, 2^84977737766 is an apocalyptic number.

84977737766 is a deficient number, since it is larger than the sum of its proper divisors (51087435994).

84977737766 is a wasteful number, since it uses less digits than its factorization.

84977737766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31496659.

The product of its digits is 522764928, while the sum is 71.

The spelling of 84977737766 in words is "eighty-four billion, nine hundred seventy-seven million, seven hundred thirty-seven thousand, seven hundred sixty-six".