720542166 has 8 divisors (see below), whose sum is σ = 1441084344. Its totient is φ = 240180720.

The previous prime is 720542153. The next prime is 720542171. The reversal of 720542166 is 661245027.

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

720542166 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60045175 + ... + 60045186.

It is an arithmetic number, because the mean of its divisors is an integer number (180135543).

Almost surely, 2^720542166 is an apocalyptic number.

720542166 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

720542166 is a wasteful number, since it uses less digits than its factorization.

720542166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120090366.

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 720542166 is about 26842.9164957908. The cubic root of 720542166 is about 896.5058618751.

The spelling of 720542166 in words is "seven hundred twenty million, five hundred forty-two thousand, one hundred sixty-six".