660132860591 has 4 divisors (see below), whose sum is σ = 660208218384. Its totient is φ = 660057502800.

The previous prime is 660132860587. The next prime is 660132860641. The reversal of 660132860591 is 195068231066.

It is a happy number.

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 660132860591 - 2² = 660132860587 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 (660132890591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37665755 + ... + 37683276.

It is an arithmetic number, because the mean of its divisors is an integer number (165052054596).

Almost surely, 2^660132860591 is an apocalyptic number.

660132860591 is a deficient number, since it is larger than the sum of its proper divisors (75357793).

660132860591 is an equidigital number, since it uses as much as digits as its factorization.

660132860591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75357792.

The product of its (nonzero) digits is 466560, while the sum is 47.

The spelling of 660132860591 in words is "six hundred sixty billion, one hundred thirty-two million, eight hundred sixty thousand, five hundred ninety-one".