1660157553601 has 32 divisors (see below), whose sum is σ = 1743072823296. Its totient is φ = 1579331520000.

The previous prime is 1660157553569. The next prime is 1660157553619. The reversal of 1660157553601 is 1063557510661.

It is a cyclic number.

It is not a de Polignac number, because 1660157553601 - 2⁵ = 1660157553569 is a prime.

It is a super-2 number, since 2×1660157553601² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1660157553401) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 507536596 + ... + 507539866.

It is an arithmetic number, because the mean of its divisors is an integer number (54471025728).

Almost surely, 2^{1660157553601} is an apocalyptic number.

It is an amenable number.

1660157553601 is a deficient number, since it is larger than the sum of its proper divisors (82915269695).

1660157553601 is a wasteful number, since it uses less digits than its factorization.

1660157553601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4513.

The product of its (nonzero) digits is 567000, while the sum is 46.

The spelling of 1660157553601 in words is "one trillion, six hundred sixty billion, one hundred fifty-seven million, five hundred fifty-three thousand, six hundred one".