40166972690 has 32 divisors (see below), whose sum is σ = 78800250816. Its totient is φ = 14652192960.

The previous prime is 40166972687. The next prime is 40166972693. The reversal of 40166972690 is 9627966104.

It is an interprime number because it is at equal distance from previous prime (40166972687) and next prime (40166972693).

It is a super-2 number, since 2×40166972690² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40166972693) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1850516 + ... + 1872095.

It is an arithmetic number, because the mean of its divisors is an integer number (2462507838).

Almost surely, 2^40166972690 is an apocalyptic number.

40166972690 is a deficient number, since it is larger than the sum of its proper divisors (38633278126).

40166972690 is a wasteful number, since it uses less digits than its factorization.

40166972690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3722714.

The product of its (nonzero) digits is 979776, while the sum is 50.

The spelling of 40166972690 in words is "forty billion, one hundred sixty-six million, nine hundred seventy-two thousand, six hundred ninety".