66611601595 has 16 divisors (see below), whose sum is σ = 99657877248. Its totient is φ = 41524115040.

The previous prime is 66611601587. The next prime is 66611601647. The reversal of 66611601595 is 59510611666.

66611601595 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66611601595 - 2³ = 66611601587 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86508189 + ... + 86508958.

It is an arithmetic number, because the mean of its divisors is an integer number (6228617328).

Almost surely, 2^66611601595 is an apocalyptic number.

66611601595 is a deficient number, since it is larger than the sum of its proper divisors (33046275653).

66611601595 is a wasteful number, since it uses less digits than its factorization.

66611601595 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173017170.

The product of its (nonzero) digits is 291600, while the sum is 46.

The spelling of 66611601595 in words is "sixty-six billion, six hundred eleven million, six hundred one thousand, five hundred ninety-five".