40666575 has 24 divisors (see below), whose sum is σ = 69408256. Its totient is φ = 20988000.

The previous prime is 40666573. The next prime is 40666579. The reversal of 40666575 is 57566604.

It is not a de Polignac number, because 40666575 - 2¹ = 40666573 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40666573) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6421 + ... + 11070.

Almost surely, 2^40666575 is an apocalyptic number.

40666575 is a deficient number, since it is larger than the sum of its proper divisors (28741681).

40666575 is a wasteful number, since it uses less digits than its factorization.

40666575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17535 (or 17530 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 39.

The square root of 40666575 is about 6377.0349693255. The cubic root of 40666575 is about 343.8844454812.

The spelling of 40666575 in words is "forty million, six hundred sixty-six thousand, five hundred seventy-five".