207339666681 has 48 divisors (see below), whose sum is σ = 329571063360. Its totient is φ = 115541153280.

The previous prime is 207339666623. The next prime is 207339666683. The reversal of 207339666681 is 186666933702.

It is not a de Polignac number, because 207339666681 - 2²¹ = 207337569529 is a prime.

It is a super-2 number, since 2×207339666681² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (207339666683) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 17888370 + ... + 17899956.

It is an arithmetic number, because the mean of its divisors is an integer number (6866063820).

Almost surely, 2^207339666681 is an apocalyptic number.

207339666681 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

207339666681 is a deficient number, since it is larger than the sum of its proper divisors (122231396679).

207339666681 is a wasteful number, since it uses less digits than its factorization.

207339666681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14614 (or 14607 counting only the distinct ones).

The product of its (nonzero) digits is 11757312, while the sum is 57.

The spelling of 207339666681 in words is "two hundred seven billion, three hundred thirty-nine million, six hundred sixty-six thousand, six hundred eighty-one".