721668006110 has 8 divisors (see below), whose sum is σ = 1299002411016. Its totient is φ = 288667202440.

The previous prime is 721668006109. The next prime is 721668006121. The reversal of 721668006110 is 11600866127.

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

It is a super-2 number, since 2×721668006110² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36083400296 + ... + 36083400315.

It is an arithmetic number, because the mean of its divisors is an integer number (162375301377).

Almost surely, 2^721668006110 is an apocalyptic number.

721668006110 is a deficient number, since it is larger than the sum of its proper divisors (577334404906).

721668006110 is a wasteful number, since it uses less digits than its factorization.

721668006110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72166800618.

The product of its (nonzero) digits is 24192, while the sum is 38.

The spelling of 721668006110 in words is "seven hundred twenty-one billion, six hundred sixty-eight million, six thousand, one hundred ten".