40664265 has 16 divisors (see below), whose sum is σ = 65196096. Its totient is φ = 21643200.

The previous prime is 40664263. The next prime is 40664279. The reversal of 40664265 is 56246604.

It is not a de Polignac number, because 40664265 - 2¹ = 40664263 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40664263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5610 + ... + 10620.

It is an arithmetic number, because the mean of its divisors is an integer number (4074756).

Almost surely, 2^40664265 is an apocalyptic number.

It is an amenable number.

40664265 is a deficient number, since it is larger than the sum of its proper divisors (24531831).

40664265 is a wasteful number, since it uses less digits than its factorization.

40664265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5560.

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 40664265 is about 6376.8538480978. The cubic root of 40664265 is about 343.8779340886.

The spelling of 40664265 in words is "forty million, six hundred sixty-four thousand, two hundred sixty-five".