720661010329 has 8 divisors (see below), whose sum is σ = 821749206600. Its totient is φ = 626094633216.

The previous prime is 720661010257. The next prime is 720661010339. The reversal of 720661010329 is 923010166027.

It can be written as a sum of positive squares in 4 ways, for example, as 23689827225 + 696971183104 = 153915^2 + 834848^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 720661010329 - 2¹³ = 720661002137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (720661010339) 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, 1630454554 + ... + 1630454995.

It is an arithmetic number, because the mean of its divisors is an integer number (102718650825).

Almost surely, 2^720661010329 is an apocalyptic number.

It is an amenable number.

720661010329 is a deficient number, since it is larger than the sum of its proper divisors (101088196271).

720661010329 is a wasteful number, since it uses less digits than its factorization.

720661010329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3260909579.

The product of its (nonzero) digits is 27216, while the sum is 37.

The spelling of 720661010329 in words is "seven hundred twenty billion, six hundred sixty-one million, ten thousand, three hundred twenty-nine".