660351216 has 80 divisors (see below), whose sum is σ = 1953160704. Its totient is φ = 188328192.

The previous prime is 660351193. The next prime is 660351239. The reversal of 660351216 is 612153066.

It is an interprime number because it is at equal distance from previous prime (660351193) and next prime (660351239).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 226021 + ... + 228923.

Almost surely, 2^660351216 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 660351216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (976580352).

660351216 is an abundant number, since it is smaller than the sum of its proper divisors (1292809488).

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

660351216 is a wasteful number, since it uses less digits than its factorization.

660351216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3598 (or 3592 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 660351216 is about 25697.2997803271. The cubic root of 660351216 is about 870.8131807663.

The spelling of 660351216 in words is "six hundred sixty million, three hundred fifty-one thousand, two hundred sixteen".