40166864 has 10 divisors (see below), whose sum is σ = 77823330. Its totient is φ = 20083424.

The previous prime is 40166851. The next prime is 40166873. The reversal of 40166864 is 46866104.

It can be written as a sum of positive squares in only one way, i.e., 39589264 + 577600 = 6292^2 + 760^2 .

It is a super-2 number, since 2×40166864² = 3226753927188992, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1255199 + ... + 1255230.

It is an arithmetic number, because the mean of its divisors is an integer number (7782333).

Almost surely, 2^40166864 is an apocalyptic number.

It is an amenable number.

40166864 is a deficient number, since it is larger than the sum of its proper divisors (37656466).

40166864 is a wasteful number, since it uses less digits than its factorization.

40166864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2510437 (or 2510431 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 40166864 is about 6337.7333487612. The cubic root of 40166864 is about 342.4700852982.

The spelling of 40166864 in words is "forty million, one hundred sixty-six thousand, eight hundred sixty-four".