666694153 has 16 divisors (see below), whose sum is σ = 715599360. Its totient is φ = 619977600.

The previous prime is 666694141. The next prime is 666694183. The reversal of 666694153 is 351496666.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-666694153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666694103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81243 + ... + 89071.

It is an arithmetic number, because the mean of its divisors is an integer number (44724960).

Almost surely, 2^666694153 is an apocalyptic number.

It is an amenable number.

666694153 is a deficient number, since it is larger than the sum of its proper divisors (48905207).

666694153 is a wasteful number, since it uses less digits than its factorization.

666694153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7968.

The product of its digits is 699840, while the sum is 46.

The square root of 666694153 is about 25820.4212397862. The cubic root of 666694153 is about 873.5924703332.

The spelling of 666694153 in words is "six hundred sixty-six million, six hundred ninety-four thousand, one hundred fifty-three".