71866880255331 has 84 divisors (see below), whose sum is σ = 127108433026224. Its totient is φ = 40488381813600.

The previous prime is 71866880255309. The next prime is 71866880255363. The reversal of 71866880255331 is 13355208866817.

71866880255331 is a `hidden beast` number, since 7 + 18 + 6 + 6 + 8 + 80 + 2 + 5 + 533 + 1 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-71866880255331 is a prime.

It is a super-2 number, since 2×71866880255331² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (71866880255431) by changing a digit.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 11632080 + ... + 16704461.

Almost surely, 2^{71866880255331} is an apocalyptic number.

71866880255331 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

71866880255331 is a deficient number, since it is larger than the sum of its proper divisors (55241552770893).

71866880255331 is an equidigital number, since it uses as much as digits as its factorization.

71866880255331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28336644 (or 28336622 counting only the distinct ones).

The product of its (nonzero) digits is 58060800, while the sum is 63.

The spelling of 71866880255331 in words is "seventy-one trillion, eight hundred sixty-six billion, eight hundred eighty million, two hundred fifty-five thousand, three hundred thirty-one".