7766721375042 has 96 divisors (see below), whose sum is σ = 18555968747520. Its totient is φ = 2160114596640.

The previous prime is 7766721375037. The next prime is 7766721375089. The reversal of 7766721375042 is 2405731276677.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 705868 + ... + 4003959.

It is an arithmetic number, because the mean of its divisors is an integer number (193291341120).

Almost surely, 2^{7766721375042} is an apocalyptic number.

7766721375042 is an abundant number, since it is smaller than the sum of its proper divisors (10789247372478).

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

7766721375042 is a wasteful number, since it uses less digits than its factorization.

7766721375042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4709996 (or 4709989 counting only the distinct ones).

The product of its (nonzero) digits is 20744640, while the sum is 57.

The spelling of 7766721375042 in words is "seven trillion, seven hundred sixty-six billion, seven hundred twenty-one million, three hundred seventy-five thousand, forty-two".