40666664 has 16 divisors (see below), whose sum is σ = 76319520. Its totient is φ = 20314800.

The previous prime is 40666657. The next prime is 40666697. The reversal of 40666664 is 46666604.

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, 12839 + ... + 15689.

It is an arithmetic number, because the mean of its divisors is an integer number (4769970).

Almost surely, 2^40666664 is an apocalyptic number.

It is an amenable number.

40666664 is a deficient number, since it is larger than the sum of its proper divisors (35652856).

40666664 is a wasteful number, since it uses less digits than its factorization.

40666664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4640 (or 4636 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 38.

The square root of 40666664 is about 6377.0419474863. The cubic root of 40666664 is about 343.8846963481.

The spelling of 40666664 in words is "forty million, six hundred sixty-six thousand, six hundred sixty-four".