66089111001599 has 4 divisors (see below), whose sum is σ = 75530412573264. Its totient is φ = 56647809429936.

The previous prime is 66089111001587. The next prime is 66089111001607. The reversal of 66089111001599 is 99510011198066.

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 66089111001599 - 2¹⁶ = 66089110936063 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 (66089111001299) 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, 4720650785822 + ... + 4720650785835.

It is an arithmetic number, because the mean of its divisors is an integer number (18882603143316).

Almost surely, 2^{66089111001599} is an apocalyptic number.

66089111001599 is a deficient number, since it is larger than the sum of its proper divisors (9441301571665).

66089111001599 is an equidigital number, since it uses as much as digits as its factorization.

66089111001599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9441301571664.

The product of its (nonzero) digits is 1049760, while the sum is 56.

The spelling of 66089111001599 in words is "sixty-six trillion, eighty-nine billion, one hundred eleven million, one thousand, five hundred ninety-nine".