660050571557 has 64 divisors (see below), whose sum is σ = 746807040000. Its totient is φ = 579501381888.

The previous prime is 660050571541. The next prime is 660050571577. The reversal of 660050571557 is 755175050066.

It is not a de Polignac number, because 660050571557 - 2⁴ = 660050571541 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 (660050571527) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1124447018 + ... + 1124447604.

It is an arithmetic number, because the mean of its divisors is an integer number (11668860000).

Almost surely, 2^660050571557 is an apocalyptic number.

It is an amenable number.

660050571557 is a deficient number, since it is larger than the sum of its proper divisors (86756468443).

660050571557 is a wasteful number, since it uses less digits than its factorization.

660050571557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1050.

The product of its (nonzero) digits is 1102500, while the sum is 47.

The spelling of 660050571557 in words is "six hundred sixty billion, fifty million, five hundred seventy-one thousand, five hundred fifty-seven".