40694666 has 8 divisors (see below), whose sum is σ = 61179300. Its totient is φ = 20301568.

The previous prime is 40694663. The next prime is 40694669. The reversal of 40694666 is 66649604.

It is an interprime number because it is at equal distance from previous prime (40694663) and next prime (40694669).

It can be written as a sum of positive squares in 2 ways, for example, as 40691641 + 3025 = 6379^2 + 55^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40694663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21761 + ... + 23556.

Almost surely, 2^40694666 is an apocalyptic number.

40694666 is a deficient number, since it is larger than the sum of its proper divisors (20484634).

40694666 is a wasteful number, since it uses less digits than its factorization.

40694666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45768.

The product of its (nonzero) digits is 186624, while the sum is 41.

The square root of 40694666 is about 6379.2371017231. The cubic root of 40694666 is about 343.9636082379.

The spelling of 40694666 in words is "forty million, six hundred ninety-four thousand, six hundred sixty-six".