660960322637 has 4 divisors (see below), whose sum is σ = 660962081820. Its totient is φ = 660958563456.

The previous prime is 660960322621. The next prime is 660960322691. The reversal of 660960322637 is 736223069066.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 489287659081 + 171672663556 = 699491^2 + 414334^2 .

It is a cyclic number.

It is not a de Polignac number, because 660960322637 - 2⁴ = 660960322621 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 (660960322037) 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, 63812 + ... + 1151517.

It is an arithmetic number, because the mean of its divisors is an integer number (165240520455).

Almost surely, 2^660960322637 is an apocalyptic number.

It is an amenable number.

660960322637 is a deficient number, since it is larger than the sum of its proper divisors (1759183).

660960322637 is a wasteful number, since it uses less digits than its factorization.

660960322637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1759182.

The product of its (nonzero) digits is 2939328, while the sum is 50.

The spelling of 660960322637 in words is "six hundred sixty billion, nine hundred sixty million, three hundred twenty-two thousand, six hundred thirty-seven".