66675231 has 60 divisors (see below), whose sum is σ = 117690408. Its totient is φ = 37503648.

The previous prime is 66675223. The next prime is 66675239. The reversal of 66675231 is 13257666.

It is an interprime number because it is at equal distance from previous prime (66675223) and next prime (66675239).

It is not a de Polignac number, because 66675231 - 2³ = 66675223 is a prime.

It is a super-2 number, since 2×66675231² = 8891172857806722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66675239) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 424605 + ... + 424761.

Almost surely, 2^66675231 is an apocalyptic number.

66675231 is a deficient number, since it is larger than the sum of its proper divisors (51015177).

66675231 is a wasteful number, since it uses less digits than its factorization.

66675231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290 (or 274 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 66675231 is about 8165.4902486011. The cubic root of 66675231 is about 405.4974956298.

The spelling of 66675231 in words is "sixty-six million, six hundred seventy-five thousand, two hundred thirty-one".