661675675089404 has 12 divisors (see below), whose sum is σ = 1184861092602264. Its totient is φ = 323143934345904.

The previous prime is 661675675089383. The next prime is 661675675089413. The reversal of 661675675089404 is 404980576576166.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1923475799507 + ... + 1923475799850.

It is an arithmetic number, because the mean of its divisors is an integer number (98738424383522).

Almost surely, 2^{661675675089404} is an apocalyptic number.

It is an amenable number.

661675675089404 is a deficient number, since it is larger than the sum of its proper divisors (523185417512860).

661675675089404 is a wasteful number, since it uses less digits than its factorization.

661675675089404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3846951599404 (or 3846951599402 counting only the distinct ones).

The product of its (nonzero) digits is 1828915200, while the sum is 74.

The spelling of 661675675089404 in words is "six hundred sixty-one trillion, six hundred seventy-five billion, six hundred seventy-five million, eighty-nine thousand, four hundred four".