11660987 has 8 divisors (see below), whose sum is σ = 12991440. Its totient is φ = 10392480.

The previous prime is 11660983. The next prime is 11660989. The reversal of 11660987 is 78906611.

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

It is a cyclic number.

It is not a de Polignac number, because 11660987 - 2² = 11660983 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11660987.

It is not an unprimeable number, because it can be changed into a prime (11660981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15089 + ... + 15842.

It is an arithmetic number, because the mean of its divisors is an integer number (1623930).

Almost surely, 2^11660987 is an apocalyptic number.

11660987 is a deficient number, since it is larger than the sum of its proper divisors (1330453).

11660987 is a wasteful number, since it uses less digits than its factorization.

11660987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30973.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 11660987 is about 3414.8187360386. The cubic root of 11660987 is about 226.7662598194.

The spelling of 11660987 in words is "eleven million, six hundred sixty thousand, nine hundred eighty-seven".