660862953 has 24 divisors (see below), whose sum is σ = 975287040. Its totient is φ = 431088480.

The previous prime is 660862927. The next prime is 660862987. The reversal of 660862953 is 359268066.

It is a happy number.

It is not a de Polignac number, because 660862953 - 2⁶ = 660862889 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 660862899 and 660862908.

It is not an unprimeable number, because it can be changed into a prime (660862903) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 115623 + ... + 121203.

It is an arithmetic number, because the mean of its divisors is an integer number (40636960).

Almost surely, 2^660862953 is an apocalyptic number.

It is an amenable number.

660862953 is a deficient number, since it is larger than the sum of its proper divisors (314424087).

660862953 is a wasteful number, since it uses less digits than its factorization.

660862953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5869 (or 5866 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The square root of 660862953 is about 25707.2548709503. The cubic root of 660862953 is about 871.0380672867.

The spelling of 660862953 in words is "six hundred sixty million, eight hundred sixty-two thousand, nine hundred fifty-three".