66046204441999 has 4 divisors (see below), whose sum is σ = 66147347175336. Its totient is φ = 65945061708664.

The previous prime is 66046204441901. The next prime is 66046204442033. The reversal of 66046204441999 is 99914440264066.

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 66046204441999 - 2⁹ = 66046204441487 is a prime.

It is a super-2 number, since 2×66046204441999² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66046204441999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66046204445999) 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, 50571365689 + ... + 50571366994.

It is an arithmetic number, because the mean of its divisors is an integer number (16536836793834).

Almost surely, 2^{66046204441999} is an apocalyptic number.

66046204441999 is a deficient number, since it is larger than the sum of its proper divisors (101142733337).

66046204441999 is a wasteful number, since it uses less digits than its factorization.

66046204441999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101142733336.

The product of its (nonzero) digits is 80621568, while the sum is 64.

The spelling of 66046204441999 in words is "sixty-six trillion, forty-six billion, two hundred four million, four hundred forty-one thousand, nine hundred ninety-nine".