11662551 has 6 divisors (see below), whose sum is σ = 16845920. Its totient is φ = 7775028.

The previous prime is 11662549. The next prime is 11662577. The reversal of 11662551 is 15526611.

It is a happy number.

It is not a de Polignac number, because 11662551 - 2¹ = 11662549 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 (11662151) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 647911 + ... + 647928.

Almost surely, 2^11662551 is an apocalyptic number.

11662551 is a deficient number, since it is larger than the sum of its proper divisors (5183369).

11662551 is a wasteful number, since it uses less digits than its factorization.

11662551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1295845 (or 1295842 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 11662551 is about 3415.0477302667. The cubic root of 11662551 is about 226.7763975140.

The spelling of 11662551 in words is "eleven million, six hundred sixty-two thousand, five hundred fifty-one".