66056594978303 has 4 divisors (see below), whose sum is σ = 67176198283080. Its totient is φ = 64936991673528.

The previous prime is 66056594978293. The next prime is 66056594978327. The reversal of 66056594978303 is 30387949565066.

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 66056594978303 - 2⁴ = 66056594978287 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 (66056594678303) 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, 559801652300 + ... + 559801652417.

It is an arithmetic number, because the mean of its divisors is an integer number (16794049570770).

Almost surely, 2^{66056594978303} is an apocalyptic number.

66056594978303 is a deficient number, since it is larger than the sum of its proper divisors (1119603304777).

66056594978303 is a wasteful number, since it uses less digits than its factorization.

66056594978303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1119603304776.

The product of its (nonzero) digits is 881798400, while the sum is 71.

The spelling of 66056594978303 in words is "sixty-six trillion, fifty-six billion, five hundred ninety-four million, nine hundred seventy-eight thousand, three hundred three".