40007666666 has 8 divisors (see below), whose sum is σ = 65467090944. Its totient is φ = 18185303020.

The previous prime is 40007666659. The next prime is 40007666707. The reversal of 40007666666 is 66666670004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×40007666666² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40007666666.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 909265130 + ... + 909265173.

It is an arithmetic number, because the mean of its divisors is an integer number (8183386368).

Almost surely, 2^40007666666 is an apocalyptic number.

40007666666 is a deficient number, since it is larger than the sum of its proper divisors (25459424278).

40007666666 is a wasteful number, since it uses less digits than its factorization.

40007666666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1818530316.

The product of its (nonzero) digits is 1306368, while the sum is 47.

The spelling of 40007666666 in words is "forty billion, seven million, six hundred sixty-six thousand, six hundred sixty-six".