10661091 has 16 divisors (see below), whose sum is σ = 17201664. Its totient is φ = 5733504.

The previous prime is 10661089. The next prime is 10661111. The reversal of 10661091 is 19016601.

10661091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 10661091 - 2¹ = 10661089 is a prime.

It is a super-2 number, since 2×10661091² = 227317722620562, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10661011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14575 + ... + 15288.

It is an arithmetic number, because the mean of its divisors is an integer number (1075104).

Almost surely, 2^10661091 is an apocalyptic number.

10661091 is a deficient number, since it is larger than the sum of its proper divisors (6540573).

10661091 is a wasteful number, since it uses less digits than its factorization.

10661091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29890.

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 10661091 is about 3265.1326159897. The cubic root of 10661091 is about 220.0901214795.

Adding to 10661091 its reverse (19016601), we get a palindrome (29677692).

The spelling of 10661091 in words is "ten million, six hundred sixty-one thousand, ninety-one".