660201131 has 4 divisors (see below), whose sum is σ = 688905552. Its totient is φ = 631496712.

The previous prime is 660201127. The next prime is 660201149. The reversal of 660201131 is 131102066.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131102066 = 2 ⋅65551033.

It is a cyclic number.

It is not a de Polignac number, because 660201131 - 2² = 660201127 is a prime.

It is a super-2 number, since 2×660201131² = 871731066747358322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (660201161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14352176 + ... + 14352221.

It is an arithmetic number, because the mean of its divisors is an integer number (172226388).

Almost surely, 2^660201131 is an apocalyptic number.

660201131 is a deficient number, since it is larger than the sum of its proper divisors (28704421).

660201131 is a wasteful number, since it uses less digits than its factorization.

660201131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28704420.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 660201131 is about 25694.3793659236. The cubic root of 660201131 is about 870.7472027958.

Adding to 660201131 its reverse (131102066), we get a palindrome (791303197).

The spelling of 660201131 in words is "six hundred sixty million, two hundred one thousand, one hundred thirty-one".