666737133 has 16 divisors (see below), whose sum is σ = 928438656. Its totient is φ = 424797120.

The previous prime is 666737129. The next prime is 666737143. The reversal of 666737133 is 331737666.

It is not a de Polignac number, because 666737133 - 2² = 666737129 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666737143) 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, 91791 + ... + 98787.

It is an arithmetic number, because the mean of its divisors is an integer number (58027416).

Almost surely, 2^666737133 is an apocalyptic number.

It is an amenable number.

666737133 is a deficient number, since it is larger than the sum of its proper divisors (261701523).

666737133 is a wasteful number, since it uses less digits than its factorization.

666737133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8404.

The product of its digits is 285768, while the sum is 42.

The square root of 666737133 is about 25821.2535133366. The cubic root of 666737133 is about 873.6112426580.

The spelling of 666737133 in words is "six hundred sixty-six million, seven hundred thirty-seven thousand, one hundred thirty-three".