718666641 has 32 divisors (see below), whose sum is σ = 1327411200. Its totient is φ = 373332240.

The previous prime is 718666601. The next prime is 718666657. The reversal of 718666641 is 146666817.

It is not a de Polignac number, because 718666641 - 2⁹ = 718666129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (718666601) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 170761 + ... + 174918.

It is an arithmetic number, because the mean of its divisors is an integer number (41481600).

Almost surely, 2^718666641 is an apocalyptic number.

It is an amenable number.

718666641 is a deficient number, since it is larger than the sum of its proper divisors (608744559).

718666641 is a wasteful number, since it uses less digits than its factorization.

718666641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345706 (or 345700 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 718666641 is about 26807.9585384639. The cubic root of 718666641 is about 895.7273369325.

The spelling of 718666641 in words is "seven hundred eighteen million, six hundred sixty-six thousand, six hundred forty-one".