66136230799 has 4 divisors (see below), whose sum is σ = 66742985320. Its totient is φ = 65529476280.

The previous prime is 66136230781. The next prime is 66136230817. The reversal of 66136230799 is 99703263166.

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

It is an interprime number because it is at equal distance from previous prime (66136230781) and next prime (66136230817).

It is a cyclic number.

It is not a de Polignac number, because 66136230799 - 2⁹ = 66136230287 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 (66136233799) 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, 303377097 + ... + 303377314.

It is an arithmetic number, because the mean of its divisors is an integer number (16685746330).

Almost surely, 2^66136230799 is an apocalyptic number.

66136230799 is a deficient number, since it is larger than the sum of its proper divisors (606754521).

66136230799 is a wasteful number, since it uses less digits than its factorization.

66136230799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606754520.

The product of its (nonzero) digits is 2204496, while the sum is 52.

The spelling of 66136230799 in words is "sixty-six billion, one hundred thirty-six million, two hundred thirty thousand, seven hundred ninety-nine".