66700403673 has 16 divisors (see below), whose sum is σ = 92831671296. Its totient is φ = 42519332240.

The previous prime is 66700403663. The next prime is 66700403677. The reversal of 66700403673 is 37630400766.

It is a cyclic number.

It is not a de Polignac number, because 66700403673 - 2³² = 62405436377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66700403677) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47236 + ... + 368282.

It is an arithmetic number, because the mean of its divisors is an integer number (5801979456).

Almost surely, 2^66700403673 is an apocalyptic number.

It is an amenable number.

66700403673 is a deficient number, since it is larger than the sum of its proper divisors (26131267623).

66700403673 is a wasteful number, since it uses less digits than its factorization.

66700403673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324084.

The product of its (nonzero) digits is 381024, while the sum is 42.

The spelling of 66700403673 in words is "sixty-six billion, seven hundred million, four hundred three thousand, six hundred seventy-three".