40665302731 has 4 divisors (see below), whose sum is σ = 40665706200. Its totient is φ = 40664899264.

The previous prime is 40665302687. The next prime is 40665302737. The reversal of 40665302731 is 13720356604.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 40665302731 - 2²⁷ = 40531085003 is a prime.

It is a super-2 number, since 2×40665302731² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40665302737) 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, 92475 + ... + 299803.

It is an arithmetic number, because the mean of its divisors is an integer number (10166426550).

Almost surely, 2^40665302731 is an apocalyptic number.

40665302731 is a deficient number, since it is larger than the sum of its proper divisors (403469).

40665302731 is a wasteful number, since it uses less digits than its factorization.

40665302731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403468.

The product of its (nonzero) digits is 90720, while the sum is 37.

It can be divided in two parts, 40665 and 302731, that added together give a square (343396 = 586²).

The spelling of 40665302731 in words is "forty billion, six hundred sixty-five million, three hundred two thousand, seven hundred thirty-one".