11966978 has 4 divisors (see below), whose sum is σ = 17950470. Its totient is φ = 5983488.

The previous prime is 11966953. The next prime is 11966993. The reversal of 11966978 is 87966911.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 11950849 + 16129 = 3457^2 + 127^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2991743 + ... + 2991746.

Almost surely, 2^11966978 is an apocalyptic number.

11966978 is a deficient number, since it is larger than the sum of its proper divisors (5983492).

11966978 is an equidigital number, since it uses as much as digits as its factorization.

11966978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5983491.

The product of its digits is 163296, while the sum is 47.

The square root of 11966978 is about 3459.3320164448. The cubic root of 11966978 is about 228.7326513961.

The spelling of 11966978 in words is "eleven million, nine hundred sixty-six thousand, nine hundred seventy-eight".