3756668665 has 8 divisors (see below), whose sum is σ = 4617953928. Its totient is φ = 2932033920.

The previous prime is 3756668599. The next prime is 3756668677. The reversal of 3756668665 is 5668666573.

It can be written as a sum of positive squares in 4 ways, for example, as 355096336 + 3401572329 = 18844^2 + 58323^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3756668665 - 2⁷ = 3756668537 is a prime.

It is a super-2 number, since 2×3756668665² = 28225118917185764450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9162402 + ... + 9162811.

It is an arithmetic number, because the mean of its divisors is an integer number (577244241).

Almost surely, 2^3756668665 is an apocalyptic number.

It is an amenable number.

3756668665 is a deficient number, since it is larger than the sum of its proper divisors (861285263).

3756668665 is a wasteful number, since it uses less digits than its factorization.

3756668665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18325259.

The product of its digits is 32659200, while the sum is 58.

The square root of 3756668665 is about 61291.6688058010. The cubic root of 3756668665 is about 1554.5366450628.

The spelling of 3756668665 in words is "three billion, seven hundred fifty-six million, six hundred sixty-eight thousand, six hundred sixty-five".