40664567999 has 16 divisors (see below), whose sum is σ = 46861226880. Its totient is φ = 34898312160.

The previous prime is 40664567963. The next prime is 40664568067. The reversal of 40664567999 is 99976546604.

It is a cyclic number.

It is not a de Polignac number, because 40664567999 - 2¹² = 40664563903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40664564999) 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, 284612 + ... + 402905.

It is an arithmetic number, because the mean of its divisors is an integer number (2928826680).

Almost surely, 2^40664567999 is an apocalyptic number.

40664567999 is a deficient number, since it is larger than the sum of its proper divisors (6196658881).

40664567999 is a wasteful number, since it uses less digits than its factorization.

40664567999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 687830.

The product of its (nonzero) digits is 88179840, while the sum is 65.

The spelling of 40664567999 in words is "forty billion, six hundred sixty-four million, five hundred sixty-seven thousand, nine hundred ninety-nine".