3706666731 has 16 divisors (see below), whose sum is σ = 5509257600. Its totient is φ = 2463056424.

The previous prime is 3706666721. The next prime is 3706666741. The reversal of 3706666731 is 1376666073.

It is an interprime number because it is at equal distance from previous prime (3706666721) and next prime (3706666741).

It is not a de Polignac number, because 3706666731 - 2¹⁷ = 3706535659 is a prime.

It is a super-2 number, since 2×3706666731² = 27478756509404452722, which contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (3706666721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 215301 + ... + 231878.

It is an arithmetic number, because the mean of its divisors is an integer number (344328600).

Almost surely, 2^3706666731 is an apocalyptic number.

3706666731 is a deficient number, since it is larger than the sum of its proper divisors (1802590869).

3706666731 is a wasteful number, since it uses less digits than its factorization.

3706666731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447495 (or 447489 counting only the distinct ones).

The product of its (nonzero) digits is 571536, while the sum is 45.

The square root of 3706666731 is about 60882.4008314390. The cubic root of 3706666731 is about 1547.6087625245.

The spelling of 3706666731 in words is "three billion, seven hundred six million, six hundred sixty-six thousand, seven hundred thirty-one".