66255345599 has 8 divisors (see below), whose sum is σ = 67884672240. Its totient is φ = 64626654400.

The previous prime is 66255345587. The next prime is 66255345643. The reversal of 66255345599 is 99554355266.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66255345599 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 (66255345799) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55757 + ... + 368265.

It is an arithmetic number, because the mean of its divisors is an integer number (8485584030).

Almost surely, 2^66255345599 is an apocalyptic number.

66255345599 is a deficient number, since it is larger than the sum of its proper divisors (1629326641).

66255345599 is a wasteful number, since it uses less digits than its factorization.

66255345599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317721.

The product of its digits is 43740000, while the sum is 59.

The spelling of 66255345599 in words is "sixty-six billion, two hundred fifty-five million, three hundred forty-five thousand, five hundred ninety-nine".