660660606157 has 16 divisors (see below), whose sum is σ = 673017226240. Its totient is φ = 648409162752.

The previous prime is 660660606103. The next prime is 660660606191. The reversal of 660660606157 is 751606066066.

It is a happy number.

660660606157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 660660606157 - 2¹⁵ = 660660573389 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 660660606157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660660606197) 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, 20216443 + ... + 20249095.

It is an arithmetic number, because the mean of its divisors is an integer number (42063576640).

Almost surely, 2^660660606157 is an apocalyptic number.

It is an amenable number.

660660606157 is a deficient number, since it is larger than the sum of its proper divisors (12356620083).

660660606157 is a wasteful number, since it uses less digits than its factorization.

660660606157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34252.

The product of its (nonzero) digits is 1632960, while the sum is 49.

The spelling of 660660606157 in words is "six hundred sixty billion, six hundred sixty million, six hundred six thousand, one hundred fifty-seven".