15980664 has 96 divisors (see below), whose sum is σ = 47278080. Its totient is φ = 4487616.

The previous prime is 15980651. The next prime is 15980677. The reversal of 15980664 is 46608951.

It is an interprime number because it is at equal distance from previous prime (15980651) and next prime (15980677).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 125769 + ... + 125895.

It is an arithmetic number, because the mean of its divisors is an integer number (492480).

Almost surely, 2^15980664 is an apocalyptic number.

15980664 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15980664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23639040).

15980664 is an abundant number, since it is smaller than the sum of its proper divisors (31297416).

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

15980664 is a wasteful number, since it uses less digits than its factorization.

15980664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257 (or 246 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 15980664 is about 3997.5822693223. The cubic root of 15980664 is about 251.8826614216.

The spelling of 15980664 in words is "fifteen million, nine hundred eighty thousand, six hundred sixty-four".