11660551 has 8 divisors (see below), whose sum is σ = 13459104. Its totient is φ = 9895200.

The previous prime is 11660549. The next prime is 11660567. The reversal of 11660551 is 15506611.

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

It is not a de Polignac number, because 11660551 - 2¹ = 11660549 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 (11660651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7540 + ... + 8953.

It is an arithmetic number, because the mean of its divisors is an integer number (1682388).

Almost surely, 2^11660551 is an apocalyptic number.

11660551 is a deficient number, since it is larger than the sum of its proper divisors (1798553).

11660551 is a wasteful number, since it uses less digits than its factorization.

11660551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16601.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 11660551 is about 3414.7548960357. The cubic root of 11660551 is about 226.7634335485.

The spelling of 11660551 in words is "eleven million, six hundred sixty thousand, five hundred fifty-one".