718016661 has 12 divisors (see below), whose sum is σ = 1038746592. Its totient is φ = 477934056.

The previous prime is 718016647. The next prime is 718016687. The reversal of 718016661 is 166610817.

It is not a de Polignac number, because 718016661 - 2¹⁰ = 718015637 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (718016161) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55831 + ... + 67476.

It is an arithmetic number, because the mean of its divisors is an integer number (86562216).

Almost surely, 2^718016661 is an apocalyptic number.

It is an amenable number.

718016661 is a deficient number, since it is larger than the sum of its proper divisors (320729931).

718016661 is a wasteful number, since it uses less digits than its factorization.

718016661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123960 (or 123957 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 718016661 is about 26795.8329036438. The cubic root of 718016661 is about 895.4572161145.

The spelling of 718016661 in words is "seven hundred eighteen million, sixteen thousand, six hundred sixty-one".