66231417628 has 12 divisors (see below), whose sum is σ = 117537445872. Its totient is φ = 32649290240.

The previous prime is 66231417613. The next prime is 66231417643. The reversal of 66231417628 is 82671413266.

It is an interprime number because it is at equal distance from previous prime (66231417613) and next prime (66231417643).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116604325 + ... + 116604892.

It is an arithmetic number, because the mean of its divisors is an integer number (9794787156).

Almost surely, 2^66231417628 is an apocalyptic number.

It is an amenable number.

66231417628 is a deficient number, since it is larger than the sum of its proper divisors (51306028244).

66231417628 is a wasteful number, since it uses less digits than its factorization.

66231417628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233209292 (or 233209290 counting only the distinct ones).

The product of its digits is 580608, while the sum is 46.

The spelling of 66231417628 in words is "sixty-six billion, two hundred thirty-one million, four hundred seventeen thousand, six hundred twenty-eight".