66376803773 has 16 divisors (see below), whose sum is σ = 80528048640. Its totient is φ = 53409981696.

The previous prime is 66376803769. The next prime is 66376803799. The reversal of 66376803773 is 37730867366.

It is a cyclic number.

It is not a de Polignac number, because 66376803773 - 2² = 66376803769 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 (66376802773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 670661 + ... + 763242.

It is an arithmetic number, because the mean of its divisors is an integer number (5033003040).

Almost surely, 2^66376803773 is an apocalyptic number.

It is an amenable number.

66376803773 is a deficient number, since it is larger than the sum of its proper divisors (14151244867).

66376803773 is a wasteful number, since it uses less digits than its factorization.

66376803773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1434316.

The product of its (nonzero) digits is 16003008, while the sum is 56.

The spelling of 66376803773 in words is "sixty-six billion, three hundred seventy-six million, eight hundred three thousand, seven hundred seventy-three".