10661157 has 12 divisors (see below), whose sum is σ = 16584204. Its totient is φ = 6560640.

The previous prime is 10661111. The next prime is 10661171. The reversal of 10661157 is 75116601.

It can be written as a sum of positive squares in 2 ways, for example, as 5157441 + 5503716 = 2271^2 + 2346^2 .

It is not a de Polignac number, because 10661157 - 2⁸ = 10660901 is a prime.

It is a super-2 number, since 2×10661157² = 227320537157298, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 10661157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10661177) 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 11 ways as a sum of consecutive naturals, for example, 45444 + ... + 45677.

It is an arithmetic number, because the mean of its divisors is an integer number (1382017).

Almost surely, 2^10661157 is an apocalyptic number.

It is an amenable number.

10661157 is a deficient number, since it is larger than the sum of its proper divisors (5923047).

10661157 is a wasteful number, since it uses less digits than its factorization.

10661157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91140 (or 91137 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 10661157 is about 3265.1427227611. The cubic root of 10661157 is about 220.0905756519.

Adding to 10661157 its reverse (75116601), we get a palindrome (85777758).

The spelling of 10661157 in words is "ten million, six hundred sixty-one thousand, one hundred fifty-seven".