66452801599 has 4 divisors (see below), whose sum is σ = 68073601680. Its totient is φ = 64832001520.

The previous prime is 66452801579. The next prime is 66452801609. The reversal of 66452801599 is 99510825466.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66452801599 - 2⁵ = 66452801567 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 (66452801509) 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, 810399979 + ... + 810400060.

It is an arithmetic number, because the mean of its divisors is an integer number (17018400420).

Almost surely, 2^66452801599 is an apocalyptic number.

66452801599 is a deficient number, since it is larger than the sum of its proper divisors (1620800081).

66452801599 is a wasteful number, since it uses less digits than its factorization.

66452801599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1620800080.

The product of its (nonzero) digits is 4665600, while the sum is 55.

The spelling of 66452801599 in words is "sixty-six billion, four hundred fifty-two million, eight hundred one thousand, five hundred ninety-nine".