11666278 has 8 divisors (see below), whose sum is σ = 18845568. Its totient is φ = 5384424.

The previous prime is 11666273. The next prime is 11666299. The reversal of 11666278 is 87266611.

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

It is a super-2 number, since 2×11666278² = 272204084746568, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11666273) 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, 224326 + ... + 224377.

It is an arithmetic number, because the mean of its divisors is an integer number (2355696).

Almost surely, 2^11666278 is an apocalyptic number.

11666278 is a deficient number, since it is larger than the sum of its proper divisors (7179290).

11666278 is a wasteful number, since it uses less digits than its factorization.

11666278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448718.

The product of its digits is 24192, while the sum is 37.

The square root of 11666278 is about 3415.5933598718. The cubic root of 11666278 is about 226.8005519097.

The spelling of 11666278 in words is "eleven million, six hundred sixty-six thousand, two hundred seventy-eight".