718620066 has 32 divisors (see below), whose sum is σ = 1603588800. Its totient is φ = 238541760.

The previous prime is 718620061. The next prime is 718620121. The reversal of 718620066 is 660026817.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 718620066.

It is not an unprimeable number, because it can be changed into a prime (718620061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14596 + ... + 40623.

It is an arithmetic number, because the mean of its divisors is an integer number (50112150).

Almost surely, 2^718620066 is an apocalyptic number.

718620066 is an abundant number, since it is smaller than the sum of its proper divisors (884968734).

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

718620066 is a wasteful number, since it uses less digits than its factorization.

718620066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55471 (or 55465 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 718620066 is about 26807.0898457852. The cubic root of 718620066 is about 895.7079865599.

The spelling of 718620066 in words is "seven hundred eighteen million, six hundred twenty thousand, sixty-six".