115666416 has 60 divisors (see below), whose sum is σ = 325646568. Its totient is φ = 38324352.

The previous prime is 115666409. The next prime is 115666417. The reversal of 115666416 is 614666511.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115666417) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22591 + ... + 27233.

Almost surely, 2^115666416 is an apocalyptic number.

115666416 is a gapful number since it is divisible by the number (16) 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 115666416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162823284).

115666416 is an abundant number, since it is smaller than the sum of its proper divisors (209980152).

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

115666416 is a wasteful number, since it uses less digits than its factorization.

115666416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4830 (or 4821 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 115666416 is about 10754.8322162645. The cubic root of 115666416 is about 487.2319504716.

The spelling of 115666416 in words is "one hundred fifteen million, six hundred sixty-six thousand, four hundred sixteen".