40008888668 has 18 divisors (see below), whose sum is σ = 81446666616. Its totient is φ = 17146666488.

The previous prime is 40008888607. The next prime is 40008888701. The reversal of 40008888668 is 86688880004.

It is a super-2 number, since 2×40008888668² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 102063296 + ... + 102063687.

It is an arithmetic number, because the mean of its divisors is an integer number (4524814812).

Almost surely, 2^40008888668 is an apocalyptic number.

It is an amenable number.

40008888668 is an abundant number, since it is smaller than the sum of its proper divisors (41437777948).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40008888668 is a wasteful number, since it uses less digits than its factorization.

40008888668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204127001 (or 204126992 counting only the distinct ones).

The product of its (nonzero) digits is 4718592, while the sum is 56.

The spelling of 40008888668 in words is "forty billion, eight million, eight hundred eighty-eight thousand, six hundred sixty-eight".