718620065 has 4 divisors (see below), whose sum is σ = 862344084. Its totient is φ = 574896048.

The previous prime is 718620061. The next prime is 718620121. The reversal of 718620065 is 560026817.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 560026817 = 7 ⋅80003831.

It can be written as a sum of positive squares in 2 ways, for example, as 269222464 + 449397601 = 16408^2 + 21199^2 .

It is a cyclic number.

It is not a de Polignac number, because 718620065 - 2² = 718620061 is a prime.

It is a Duffinian number.

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 3 ways as a sum of consecutive naturals, for example, 71862002 + ... + 71862011.

It is an arithmetic number, because the mean of its divisors is an integer number (215586021).

Almost surely, 2^718620065 is an apocalyptic number.

It is an amenable number.

718620065 is a deficient number, since it is larger than the sum of its proper divisors (143724019).

718620065 is a wasteful number, since it uses less digits than its factorization.

718620065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143724018.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 718620065 is about 26807.0898271334. The cubic root of 718620065 is about 895.7079861444.

The spelling of 718620065 in words is "seven hundred eighteen million, six hundred twenty thousand, sixty-five".