77066494904 has 24 divisors (see below), whose sum is σ = 165146940840. Its totient is φ = 33027607488.

The previous prime is 77066494873. The next prime is 77066494993. The reversal of 77066494904 is 40949466077.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a self number, because there is not a number n which added to its sum of digits gives 77066494904.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2058884 + ... + 2095980.

It is an arithmetic number, because the mean of its divisors is an integer number (6881122535).

Almost surely, 2^77066494904 is an apocalyptic number.

It is an amenable number.

77066494904 is an abundant number, since it is smaller than the sum of its proper divisors (88080445936).

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

77066494904 is an frugal number, since it uses more digits than its factorization.

77066494904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74207 (or 37106 counting only the distinct ones).

The product of its (nonzero) digits is 9144576, while the sum is 56.

Multiplying 77066494904 by its sum of digits (56), we get a square (4315723714624 = 2077432²).

77066494904 divided by its sum of digits (56) gives a square (1376187409 = 37097²).

It can be divided in two parts, 770664 and 94904, that added together give a palindrome (865568).

The spelling of 77066494904 in words is "seventy-seven billion, sixty-six million, four hundred ninety-four thousand, nine hundred four".