66870443577 has 8 divisors (see below), whose sum is σ = 101897818816. Its totient is φ = 38211682032.

The previous prime is 66870443557. The next prime is 66870443579. The reversal of 66870443577 is 77534407866.

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

It is not a de Polignac number, because 66870443577 - 2¹¹ = 66870441529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66870443579) 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, 1592153398 + ... + 1592153439.

It is an arithmetic number, because the mean of its divisors is an integer number (12737227352).

Almost surely, 2^66870443577 is an apocalyptic number.

It is an amenable number.

66870443577 is a deficient number, since it is larger than the sum of its proper divisors (35027375239).

66870443577 is a wasteful number, since it uses less digits than its factorization.

66870443577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3184306847.

The product of its (nonzero) digits is 23708160, while the sum is 57.

The spelling of 66870443577 in words is "sixty-six billion, eight hundred seventy million, four hundred forty-three thousand, five hundred seventy-seven".