668014288 has 40 divisors (see below), whose sum is σ = 1367142656. Its totient is φ = 315705600.

The previous prime is 668014273. The next prime is 668014289. The reversal of 668014288 is 882410866.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668014289) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5668 + ... + 36988.

Almost surely, 2^668014288 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 668014288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (683571328).

668014288 is an abundant number, since it is smaller than the sum of its proper divisors (699128368).

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

668014288 is a wasteful number, since it uses less digits than its factorization.

668014288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31403 (or 31397 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 43.

The square root of 668014288 is about 25845.9723748208. The cubic root of 668014288 is about 874.1686963927.

The spelling of 668014288 in words is "six hundred sixty-eight million, fourteen thousand, two hundred eighty-eight".