116661520 has 160 divisors (see below), whose sum is σ = 308551680. Its totient is φ = 40803840.

The previous prime is 116661491. The next prime is 116661551. The reversal of 116661520 is 25166611.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1643085 + ... + 1643155.

It is an arithmetic number, because the mean of its divisors is an integer number (1928448).

Almost surely, 2^116661520 is an apocalyptic number.

116661520 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 116661520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (154275840).

116661520 is an abundant number, since it is smaller than the sum of its proper divisors (191890160).

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

116661520 is a wasteful number, since it uses less digits than its factorization.

116661520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173 (or 167 counting only the distinct ones).

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

The square root of 116661520 is about 10800.9962503465. The cubic root of 116661520 is about 488.6252176306.

The spelling of 116661520 in words is "one hundred sixteen million, six hundred sixty-one thousand, five hundred twenty".