666890675 has 24 divisors (see below), whose sum is σ = 903282960. Its totient is φ = 484387200.

The previous prime is 666890657. The next prime is 666890677. The reversal of 666890675 is 576098666.

It is not a de Polignac number, because 666890675 - 2⁶ = 666890611 is a prime.

It is a super-3 number, since 3×666890675³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (666890677) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 398741 + ... + 400409.

It is an arithmetic number, because the mean of its divisors is an integer number (37636790).

Almost surely, 2^666890675 is an apocalyptic number.

666890675 is a deficient number, since it is larger than the sum of its proper divisors (236392285).

666890675 is a wasteful number, since it uses less digits than its factorization.

666890675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3143 (or 3138 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 53.

The square root of 666890675 is about 25824.2265131020. The cubic root of 666890675 is about 873.6782984313.

The spelling of 666890675 in words is "six hundred sixty-six million, eight hundred ninety thousand, six hundred seventy-five".