40664903 has 2 divisors, whose sum is σ = 40664904. Its totient is φ = 40664902.

The previous prime is 40664879. The next prime is 40664933. The reversal of 40664903 is 30946604.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40664903 - 2¹⁴ = 40648519 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40664903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40664933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20332451 + 20332452.

It is an arithmetic number, because the mean of its divisors is an integer number (20332452).

Almost surely, 2^40664903 is an apocalyptic number.

40664903 is a deficient number, since it is larger than the sum of its proper divisors (1).

40664903 is an equidigital number, since it uses as much as digits as its factorization.

40664903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 40664903 is about 6376.9038725701. The cubic root of 40664903 is about 343.8797324979.

The spelling of 40664903 in words is "forty million, six hundred sixty-four thousand, nine hundred three".