660016231 has 12 divisors (see below), whose sum is σ = 772381008. Its totient is φ = 562333632.

The previous prime is 660016219. The next prime is 660016267. The reversal of 660016231 is 132610066.

It is not a de Polignac number, because 660016231 - 2⁵ = 660016199 is a prime.

It is a super-2 number, since 2×660016231² = 871242850366890722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 660016196 and 660016205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660016031) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32146 + ... + 48511.

It is an arithmetic number, because the mean of its divisors is an integer number (64365084).

Almost surely, 2^660016231 is an apocalyptic number.

660016231 is a deficient number, since it is larger than the sum of its proper divisors (112364777).

660016231 is a wasteful number, since it uses less digits than its factorization.

660016231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80838 (or 80831 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 660016231 is about 25690.7810507972. The cubic root of 660016231 is about 870.6659062621.

Adding to 660016231 its reverse (132610066), we get a palindrome (792626297).

The spelling of 660016231 in words is "six hundred sixty million, sixteen thousand, two hundred thirty-one".