10661949 has 40 divisors (see below), whose sum is σ = 17075520. Its totient is φ = 6614784.

The previous prime is 10661939. The next prime is 10661971. The reversal of 10661949 is 94916601.

It is a de Polignac number, because none of the positive numbers 2^k-10661949 is a prime.

It is a super-2 number, since 2×10661949² = 227354312957202, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10661929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 109869 + ... + 109965.

It is an arithmetic number, because the mean of its divisors is an integer number (426888).

Almost surely, 2^10661949 is an apocalyptic number.

It is an amenable number.

10661949 is a deficient number, since it is larger than the sum of its proper divisors (6413571).

10661949 is an equidigital number, since it uses as much as digits as its factorization.

10661949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191 (or 182 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 10661949 is about 3265.2640015778. The cubic root of 10661949 is about 220.0960255738.

The spelling of 10661949 in words is "ten million, six hundred sixty-one thousand, nine hundred forty-nine".