666203017475 has 12 divisors (see below), whose sum is σ = 833812228584. Its totient is φ = 527981454720.

The previous prime is 666203017451. The next prime is 666203017499. The reversal of 666203017475 is 574710302666.

It is an interprime number because it is at equal distance from previous prime (666203017451) and next prime (666203017499).

It is not a de Polignac number, because 666203017475 - 2⁶ = 666203017411 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 124521254 + ... + 124526603.

It is an arithmetic number, because the mean of its divisors is an integer number (69484352382).

Almost surely, 2^666203017475 is an apocalyptic number.

666203017475 is a deficient number, since it is larger than the sum of its proper divisors (167609211109).

666203017475 is a wasteful number, since it uses less digits than its factorization.

666203017475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249047974 (or 249047969 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 47.

The spelling of 666203017475 in words is "six hundred sixty-six billion, two hundred three million, seventeen thousand, four hundred seventy-five".