915444666 has 56 divisors (see below), whose sum is σ = 2148400800. Its totient is φ = 291870216.

The previous prime is 915444613. The next prime is 915444667. The reversal of 915444666 is 666444519.

It is a happy number.

915444666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (915444667) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 19885 + ... + 47183.

It is an arithmetic number, because the mean of its divisors is an integer number (38364300).

Almost surely, 2^915444666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 915444666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1074200400).

915444666 is an abundant number, since it is smaller than the sum of its proper divisors (1232956134).

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

915444666 is a wasteful number, since it uses less digits than its factorization.

915444666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27342 (or 27327 counting only the distinct ones).

The product of its digits is 622080, while the sum is 45.

The square root of 915444666 is about 30256.3161339909. The cubic root of 915444666 is about 970.9809278342.

The spelling of 915444666 in words is "nine hundred fifteen million, four hundred forty-four thousand, six hundred sixty-six".