14991660 has 72 divisors (see below), whose sum is σ = 46724496. Its totient is φ = 3888000.

The previous prime is 14991659. The next prime is 14991667. The reversal of 14991660 is 6619941.

14991660 is a `hidden beast` number, since 1 + 499 + 166 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (14991667) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5535 + ... + 7785.

Almost surely, 2^14991660 is an apocalyptic number.

14991660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 14991660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23362248).

14991660 is an abundant number, since it is smaller than the sum of its proper divisors (31732836).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

14991660 is a wasteful number, since it uses less digits than its factorization.

14991660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2303 (or 2298 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 14991660 is about 3871.9065071357. The cubic root of 14991660 is about 246.5754918289.

It can be divided in two parts, 14991 and 660, that added together give a palindrome (15651).

The spelling of 14991660 in words is "fourteen million, nine hundred ninety-one thousand, six hundred sixty".