40660631 has 4 divisors (see below), whose sum is σ = 44357064. Its totient is φ = 36964200.

The previous prime is 40660577. The next prime is 40660637. The reversal of 40660631 is 13606604.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40660631 - 2²² = 36466327 is a prime.

It is a super-2 number, since 2×40660631² = 3306573826636322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40660631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40660637) 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, 1848200 + ... + 1848221.

It is an arithmetic number, because the mean of its divisors is an integer number (11089266).

Almost surely, 2^40660631 is an apocalyptic number.

40660631 is a deficient number, since it is larger than the sum of its proper divisors (3696433).

40660631 is a wasteful number, since it uses less digits than its factorization.

40660631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3696432.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 40660631 is about 6376.5689049833. The cubic root of 40660631 is about 343.8676901259.

The spelling of 40660631 in words is "forty million, six hundred sixty thousand, six hundred thirty-one".