37807668666 has 24 divisors (see below), whose sum is σ = 82136245620. Its totient is φ = 12568766976.

The previous prime is 37807668649. The next prime is 37807668683. The reversal of 37807668666 is 66686670873.

It is an interprime number because it is at equal distance from previous prime (37807668649) and next prime (37807668683).

It can be written as a sum of positive squares in 2 ways, for example, as 37680633225 + 127035441 = 194115^2 + 11271^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2808871 + ... + 2822298.

Almost surely, 2^37807668666 is an apocalyptic number.

37807668666 is an abundant number, since it is smaller than the sum of its proper divisors (44328576954).

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

37807668666 is a wasteful number, since it uses less digits than its factorization.

37807668666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5631550 (or 5631547 counting only the distinct ones).

The product of its (nonzero) digits is 73156608, while the sum is 63.

The spelling of 37807668666 in words is "thirty-seven billion, eight hundred seven million, six hundred sixty-eight thousand, six hundred sixty-six".