40666899 has 32 divisors (see below), whose sum is σ = 67185664. Its totient is φ = 21306240.

The previous prime is 40666889. The next prime is 40666933. The reversal of 40666899 is 99866604.

It is not a de Polignac number, because 40666899 - 2²⁴ = 23889683 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40666819) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49002 + ... + 49824.

It is an arithmetic number, because the mean of its divisors is an integer number (2099552).

Almost surely, 2^40666899 is an apocalyptic number.

40666899 is a deficient number, since it is larger than the sum of its proper divisors (26518765).

40666899 is a wasteful number, since it uses less digits than its factorization.

40666899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1027.

The product of its (nonzero) digits is 559872, while the sum is 48.

The square root of 40666899 is about 6377.0603729305. The cubic root of 40666899 is about 343.8853587478.

The spelling of 40666899 in words is "forty million, six hundred sixty-six thousand, eight hundred ninety-nine".