668701488 has 160 divisors (see below), whose sum is σ = 2199859200. Its totient is φ = 170247168.

The previous prime is 668701487. The next prime is 668701489. The reversal of 668701488 is 884107866.

It is an interprime number because it is at equal distance from previous prime (668701487) and next prime (668701489).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (668701487) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 124033 + ... + 129311.

It is an arithmetic number, because the mean of its divisors is an integer number (13749120).

Almost surely, 2^668701488 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 668701488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1099929600).

668701488 is an abundant number, since it is smaller than the sum of its proper divisors (1531157712).

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

668701488 is a wasteful number, since it uses less digits than its factorization.

668701488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5339 (or 5333 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 48.

The square root of 668701488 is about 25859.2630985494. The cubic root of 668701488 is about 874.4683520850.

668701488 divided by its sum of digits (48) gives a triangular number (13931281 = T₅₂₇₈).

The spelling of 668701488 in words is "six hundred sixty-eight million, seven hundred one thousand, four hundred eighty-eight".