40665407213988 has 144 divisors (see below), whose sum is σ = 106704435888960. Its totient is φ = 13042614816000.

The previous prime is 40665407213987. The next prime is 40665407213999. The reversal of 40665407213988 is 88931270456604.

40665407213988 is a `hidden beast` number, since 4 + 0 + 6 + 6 + 5 + 407 + 213 + 9 + 8 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (40665407213987) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 852482538 + ... + 852530238.

It is a 1-persistent number, because it is pandigital, but 2⋅40665407213988 = 81330814427976 is not.

Almost surely, 2^{40665407213988} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40665407213988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53352217944480).

40665407213988 is an abundant number, since it is smaller than the sum of its proper divisors (66039028674972).

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

40665407213988 is a wasteful number, since it uses less digits than its factorization.

40665407213988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50538 (or 50533 counting only the distinct ones).

The product of its (nonzero) digits is 69672960, while the sum is 63.

The spelling of 40665407213988 in words is "forty trillion, six hundred sixty-five billion, four hundred seven million, two hundred thirteen thousand, nine hundred eighty-eight".