66358776583 has 4 divisors (see below), whose sum is σ = 72391392648. Its totient is φ = 60326160520.

The previous prime is 66358776581. The next prime is 66358776697. The reversal of 66358776583 is 38567785366.

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 66358776583 - 2¹ = 66358776581 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 (66358776581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3016308016 + ... + 3016308037.

It is an arithmetic number, because the mean of its divisors is an integer number (18097848162).

Almost surely, 2^66358776583 is an apocalyptic number.

66358776583 is a deficient number, since it is larger than the sum of its proper divisors (6032616065).

66358776583 is a wasteful number, since it uses less digits than its factorization.

66358776583 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6032616064.

The product of its digits is 152409600, while the sum is 64.

The spelling of 66358776583 in words is "sixty-six billion, three hundred fifty-eight million, seven hundred seventy-six thousand, five hundred eighty-three".