207691668 has 48 divisors (see below), whose sum is σ = 539636160. Its totient is φ = 69079392.

The previous prime is 207691667. The next prime is 207691699. The reversal of 207691668 is 866196702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (207691663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54646 + ... + 58322.

It is an arithmetic number, because the mean of its divisors is an integer number (11242420).

Almost surely, 2^207691668 is an apocalyptic number.

It is an amenable number.

207691668 is an abundant number, since it is smaller than the sum of its proper divisors (331944492).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

207691668 is a wasteful number, since it uses less digits than its factorization.

207691668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4213 (or 4205 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 207691668 is about 14411.5116486786. The cubic root of 207691668 is about 592.2063021249.

The spelling of 207691668 in words is "two hundred seven million, six hundred ninety-one thousand, six hundred sixty-eight".