11666251 has 2 divisors, whose sum is σ = 11666252. Its totient is φ = 11666250.

The previous prime is 11666243. The next prime is 11666257. The reversal of 11666251 is 15266611.

11666251 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (15266611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11666251 - 2³ = 11666243 is a prime.

It is a super-2 number, since 2×11666251² = 272202824790002, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11666257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5833125 + 5833126.

It is an arithmetic number, because the mean of its divisors is an integer number (5833126).

Almost surely, 2^11666251 is an apocalyptic number.

11666251 is a deficient number, since it is larger than the sum of its proper divisors (1).

11666251 is an equidigital number, since it uses as much as digits as its factorization.

11666251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 28.

The square root of 11666251 is about 3415.5894074083. The cubic root of 11666251 is about 226.8003769433.

The spelling of 11666251 in words is "eleven million, six hundred sixty-six thousand, two hundred fifty-one".