40166660 has 12 divisors (see below), whose sum is σ = 84350028. Its totient is φ = 16066656.

The previous prime is 40166603. The next prime is 40166713. The reversal of 40166660 is 6666104.

It can be written as a sum of positive squares in 2 ways, for example, as 19518724 + 20647936 = 4418^2 + 4544^2 .

It is a super-2 number, since 2×40166660² = 3226721151111200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1004147 + ... + 1004186.

It is an arithmetic number, because the mean of its divisors is an integer number (7029169).

Almost surely, 2^40166660 is an apocalyptic number.

It is an amenable number.

40166660 is an abundant number, since it is smaller than the sum of its proper divisors (44183368).

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

40166660 is a wasteful number, since it uses less digits than its factorization.

40166660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2008342 (or 2008340 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 40166660 is about 6337.7172546588. The cubic root of 40166660 is about 342.4695055167.

The spelling of 40166660 in words is "forty million, one hundred sixty-six thousand, six hundred sixty".