40166604261 has 12 divisors (see below), whose sum is σ = 66306775392. Its totient is φ = 22952345256.

The previous prime is 40166604239. The next prime is 40166604271. The reversal of 40166604261 is 16240666104.

It is not a de Polignac number, because 40166604261 - 2⁵ = 40166604229 is a prime.

It is a super-2 number, since 2×40166604261² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40166604271) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 318782511 + ... + 318782636.

It is an arithmetic number, because the mean of its divisors is an integer number (5525564616).

Almost surely, 2^40166604261 is an apocalyptic number.

It is an amenable number.

40166604261 is a deficient number, since it is larger than the sum of its proper divisors (26140171131).

40166604261 is a wasteful number, since it uses less digits than its factorization.

40166604261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637565160 (or 637565157 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The spelling of 40166604261 in words is "forty billion, one hundred sixty-six million, six hundred four thousand, two hundred sixty-one".