11651866 has 8 divisors (see below), whose sum is σ = 17546580. Its totient is φ = 5803008.

The previous prime is 11651863. The next prime is 11651867. The reversal of 11651866 is 66815611.

11651866 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

11651866 is an esthetic number in base 8, because in such base its adjacent digits differ by 1.

It can be written as a sum of positive squares in 2 ways, for example, as 7535025 + 4116841 = 2745^2 + 2029^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (11651863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10821 + ... + 11848.

Almost surely, 2^11651866 is an apocalyptic number.

11651866 is a deficient number, since it is larger than the sum of its proper divisors (5894714).

11651866 is a wasteful number, since it uses less digits than its factorization.

11651866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22928.

The product of its digits is 8640, while the sum is 34.

The square root of 11651866 is about 3413.4829719804. The cubic root of 11651866 is about 226.7071203268.

The spelling of 11651866 in words is "eleven million, six hundred fifty-one thousand, eight hundred sixty-six".