716778071 has 4 divisors (see below), whose sum is σ = 718215000. Its totient is φ = 715341144.

The previous prime is 716778067. The next prime is 716778091. The reversal of 716778071 is 170877617.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 170877617 = 71 ⋅2406727.

It is a cyclic number.

It is not a de Polignac number, because 716778071 - 2² = 716778067 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (716778011) 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, 717716 + ... + 718713.

It is an arithmetic number, because the mean of its divisors is an integer number (179553750).

Almost surely, 2^716778071 is an apocalyptic number.

716778071 is a deficient number, since it is larger than the sum of its proper divisors (1436929).

716778071 is a wasteful number, since it uses less digits than its factorization.

716778071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1436928.

The product of its (nonzero) digits is 115248, while the sum is 44.

The square root of 716778071 is about 26772.7113120804. The cubic root of 716778071 is about 894.9420271845.

The spelling of 716778071 in words is "seven hundred sixteen million, seven hundred seventy-eight thousand, seventy-one".