720866126 has 8 divisors (see below), whose sum is σ = 1116179904. Its totient is φ = 348806160.

The previous prime is 720866117. The next prime is 720866129. The reversal of 720866126 is 621668027.

It is a happy number.

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

It is a super-2 number, since 2×720866126² = 1039295943228495752, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 720866126.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720866129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5813375 + ... + 5813498.

It is an arithmetic number, because the mean of its divisors is an integer number (139522488).

Almost surely, 2^720866126 is an apocalyptic number.

720866126 is a deficient number, since it is larger than the sum of its proper divisors (395313778).

720866126 is a wasteful number, since it uses less digits than its factorization.

720866126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11626906.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 720866126 is about 26848.9501843182. The cubic root of 720866126 is about 896.6401998487.

The spelling of 720866126 in words is "seven hundred twenty million, eight hundred sixty-six thousand, one hundred twenty-six".