40601665 has 16 divisors (see below), whose sum is σ = 53258688. Its totient is φ = 29532096.

The previous prime is 40601663. The next prime is 40601669. The reversal of 40601665 is 56610604.

It is a cyclic number.

It is not a de Polignac number, because 40601665 - 2¹ = 40601663 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40601663) 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, 307 + ... + 9016.

It is an arithmetic number, because the mean of its divisors is an integer number (3328668).

Almost surely, 2^40601665 is an apocalyptic number.

It is an amenable number.

40601665 is a deficient number, since it is larger than the sum of its proper divisors (12657023).

40601665 is a wasteful number, since it uses less digits than its factorization.

40601665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9408.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 40601665 is about 6371.9435810434. The cubic root of 40601665 is about 343.7013841991.

The spelling of 40601665 in words is "forty million, six hundred one thousand, six hundred sixty-five".