660600131 has 4 divisors (see below), whose sum is σ = 666774072. Its totient is φ = 654426192.

The previous prime is 660600067. The next prime is 660600137. The reversal of 660600131 is 131006066.

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

It is a cyclic number.

It is not a de Polignac number, because 660600131 - 2⁶ = 660600067 is a prime.

It is a super-2 number, since 2×660600131² = 872785066154434322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 660600097 and 660600106.

It is not an unprimeable number, because it can be changed into a prime (660600137) 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, 3086810 + ... + 3087023.

It is an arithmetic number, because the mean of its divisors is an integer number (166693518).

Almost surely, 2^660600131 is an apocalyptic number.

660600131 is a deficient number, since it is larger than the sum of its proper divisors (6173941).

660600131 is a wasteful number, since it uses less digits than its factorization.

660600131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6173940.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 660600131 is about 25702.1425371505. The cubic root of 660600131 is about 870.9225827674.

Adding to 660600131 its reverse (131006066), we get a palindrome (791606197).

The spelling of 660600131 in words is "six hundred sixty million, six hundred thousand, one hundred thirty-one".