39700661 has 32 divisors (see below), whose sum is σ = 56464128. Its totient is φ = 26864640.

The previous prime is 39700651. The next prime is 39700663. The reversal of 39700661 is 16600793.

It is not a de Polignac number, because 39700661 - 2⁶ = 39700597 is a prime.

It is a super-2 number, since 2×39700661² = 3152284967673842, which contains 22 as substring.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39700663) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15851 + ... + 18183.

It is an arithmetic number, because the mean of its divisors is an integer number (1764504).

Almost surely, 2^39700661 is an apocalyptic number.

It is an amenable number.

39700661 is a deficient number, since it is larger than the sum of its proper divisors (16763467).

39700661 is a wasteful number, since it uses less digits than its factorization.

39700661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2381.

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 39700661 is about 6300.8460543010. The cubic root of 39700661 is about 341.1399482325.

The spelling of 39700661 in words is "thirty-nine million, seven hundred thousand, six hundred sixty-one".