721966080 has 176 divisors, whose sum is σ = 2519676864. Its totient is φ = 174981120.

The previous prime is 721966073. The next prime is 721966169. The reversal of 721966080 is 80669127.

It is a tau number, because it is divible by the number of its divisors (176).

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, 166824 + ... + 171096.

Almost surely, 2^721966080 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 721966080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1259838432).

721966080 is an abundant number, since it is smaller than the sum of its proper divisors (1797710784).

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

721966080 is a wasteful number, since it uses less digits than its factorization.

721966080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4312 (or 4294 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 721966080 is about 26869.4264918327. The cubic root of 721966080 is about 897.0960227005.

The spelling of 721966080 in words is "seven hundred twenty-one million, nine hundred sixty-six thousand, eighty".