40066640823 has 48 divisors (see below), whose sum is σ = 59189043200. Its totient is φ = 24089788800.

The previous prime is 40066640821. The next prime is 40066640827. The reversal of 40066640823 is 32804666004.

40066640823 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40066640823 - 2¹ = 40066640821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40066640821) 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, 31325898 + ... + 31327176.

Almost surely, 2^40066640823 is an apocalyptic number.

40066640823 is a deficient number, since it is larger than the sum of its proper divisors (19122402377).

40066640823 is a wasteful number, since it uses less digits than its factorization.

40066640823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1924 (or 1913 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 39.

The spelling of 40066640823 in words is "forty billion, sixty-six million, six hundred forty thousand, eight hundred twenty-three".