720661493670 has 16 divisors (see below), whose sum is σ = 1729587584880. Its totient is φ = 192176398304.

The previous prime is 720661493621. The next prime is 720661493677. The reversal of 720661493670 is 76394166027.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720661493677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12011024865 + ... + 12011024924.

It is an arithmetic number, because the mean of its divisors is an integer number (108099224055).

Almost surely, 2^720661493670 is an apocalyptic number.

720661493670 is an abundant number, since it is smaller than the sum of its proper divisors (1008926091210).

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

720661493670 is a wasteful number, since it uses less digits than its factorization.

720661493670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24022049799.

The product of its (nonzero) digits is 2286144, while the sum is 51.

The spelling of 720661493670 in words is "seven hundred twenty billion, six hundred sixty-one million, four hundred ninety-three thousand, six hundred seventy".