10661931 has 24 divisors (see below), whose sum is σ = 17821440. Its totient is φ = 6016176.

The previous prime is 10661929. The next prime is 10661939. The reversal of 10661931 is 13916601.

10661931 is a `hidden beast` number, since 10 + 6 + 619 + 31 = 666.

It is not a de Polignac number, because 10661931 - 2¹ = 10661929 is a prime.

It is a super-2 number, since 2×10661931² = 227353545297522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 10661895 and 10661904.

It is not an unprimeable number, because it can be changed into a prime (10661939) 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, 4210 + ... + 6248.

It is an arithmetic number, because the mean of its divisors is an integer number (742560).

Almost surely, 2^10661931 is an apocalyptic number.

10661931 is a deficient number, since it is larger than the sum of its proper divisors (7159509).

10661931 is a wasteful number, since it uses less digits than its factorization.

10661931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2135 (or 2132 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 10661931 is about 3265.2612452911. The cubic root of 10661931 is about 220.0959017149.

The spelling of 10661931 in words is "ten million, six hundred sixty-one thousand, nine hundred thirty-one".