31366664 has 80 divisors (see below), whose sum is σ = 72601920. Its totient is φ = 12677280.

The previous prime is 31366607. The next prime is 31366667. The reversal of 31366664 is 46666313.

It is a super-2 number, since 2×31366664² = 1967735220977792, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31366667) 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 19 ways as a sum of consecutive naturals, for example, 441749 + ... + 441819.

It is an arithmetic number, because the mean of its divisors is an integer number (907524).

Almost surely, 2^31366664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31366664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36300960).

31366664 is an abundant number, since it is smaller than the sum of its proper divisors (41235256).

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

31366664 is an equidigital number, since it uses as much as digits as its factorization.

31366664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128 (or 103 counting only the distinct ones).

The product of its digits is 46656, while the sum is 35.

The square root of 31366664 is about 5600.5949683940. The cubic root of 31366664 is about 315.3717421918.

The spelling of 31366664 in words is "thirty-one million, three hundred sixty-six thousand, six hundred sixty-four".