40661199 has 6 divisors (see below), whose sum is σ = 58732856. Its totient is φ = 27107460.

The previous prime is 40661167. The next prime is 40661213. The reversal of 40661199 is 99116604.

40661199 is a `hidden beast` number, since 406 + 61 + 199 = 666.

It is not a de Polignac number, because 40661199 - 2⁵ = 40661167 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 (40661099) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2258947 + ... + 2258964.

Almost surely, 2^40661199 is an apocalyptic number.

40661199 is a deficient number, since it is larger than the sum of its proper divisors (18071657).

40661199 is a wasteful number, since it uses less digits than its factorization.

40661199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4517917 (or 4517914 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 40661199 is about 6376.6134428864. The cubic root of 40661199 is about 343.8692913139.

The spelling of 40661199 in words is "forty million, six hundred sixty-one thousand, one hundred ninety-nine".