3756665720 has 16 divisors (see below), whose sum is σ = 8452497960. Its totient is φ = 1502666272.

The previous prime is 3756665719. The next prime is 3756665723. The reversal of 3756665720 is 275666573.

It is a super-2 number, since 2×3756665720² = 28225074663646236800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3756665723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46958282 + ... + 46958361.

Almost surely, 2^3756665720 is an apocalyptic number.

It is an amenable number.

3756665720 is an abundant number, since it is smaller than the sum of its proper divisors (4695832240).

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

3756665720 is a wasteful number, since it uses less digits than its factorization.

3756665720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93916654 (or 93916650 counting only the distinct ones).

The product of its (nonzero) digits is 1587600, while the sum is 47.

The square root of 3756665720 is about 61291.6447813240. The cubic root of 3756665720 is about 1554.5362388420.

The spelling of 3756665720 in words is "three billion, seven hundred fifty-six million, six hundred sixty-five thousand, seven hundred twenty".