11956663 has 4 divisors (see below), whose sum is σ = 12023640. Its totient is φ = 11889688.

The previous prime is 11956657. The next prime is 11956673. The reversal of 11956663 is 36665911.

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

It is a cyclic number.

It is not a de Polignac number, because 11956663 - 2⁵ = 11956631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11956673) 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, 33220 + ... + 33577.

It is an arithmetic number, because the mean of its divisors is an integer number (3005910).

Almost surely, 2^11956663 is an apocalyptic number.

11956663 is a deficient number, since it is larger than the sum of its proper divisors (66977).

11956663 is an equidigital number, since it uses as much as digits as its factorization.

11956663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66976.

The product of its digits is 29160, while the sum is 37.

The square root of 11956663 is about 3457.8408002683. The cubic root of 11956663 is about 228.6669133984. Note that the first 3 decimals are identical.

The spelling of 11956663 in words is "eleven million, nine hundred fifty-six thousand, six hundred sixty-three".