116660521 has 4 divisors (see below), whose sum is σ = 117174672. Its totient is φ = 116146372.

The previous prime is 116660503. The next prime is 116660543. The reversal of 116660521 is 125066611.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 125066611 = 5641 ⋅22171.

It is a cyclic number.

It is not a de Polignac number, because 116660521 - 2⁹ = 116660009 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 116660521.

It is not an unprimeable number, because it can be changed into a prime (116660501) 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 3 ways as a sum of consecutive naturals, for example, 256735 + ... + 257188.

It is an arithmetic number, because the mean of its divisors is an integer number (29293668).

Almost surely, 2^116660521 is an apocalyptic number.

It is an amenable number.

116660521 is a deficient number, since it is larger than the sum of its proper divisors (514151).

116660521 is an equidigital number, since it uses as much as digits as its factorization.

116660521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514150.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 116660521 is about 10800.9500045135. The cubic root of 116660521 is about 488.6238228891.

The spelling of 116660521 in words is "one hundred sixteen million, six hundred sixty thousand, five hundred twenty-one".