665776525994 has 16 divisors (see below), whose sum is σ = 1070249459328. Its totient is φ = 309809052432.

The previous prime is 665776525987. The next prime is 665776526011. The reversal of 665776525994 is 499525677566.

665776525994 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×665776525994³ (a number of 36 digits) contains 333 as substring.

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, 195584822 + ... + 195588225.

It is an arithmetic number, because the mean of its divisors is an integer number (66890591208).

Almost surely, 2^665776525994 is an apocalyptic number.

665776525994 is a deficient number, since it is larger than the sum of its proper divisors (404472933334).

665776525994 is a wasteful number, since it uses less digits than its factorization.

665776525994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391173109.

The product of its digits is 857304000, while the sum is 71.

The spelling of 665776525994 in words is "six hundred sixty-five billion, seven hundred seventy-six million, five hundred twenty-five thousand, nine hundred ninety-four".