716661 has 32 divisors (see below), whose sum is σ = 1228800. Its totient is φ = 408240.

The previous prime is 716659. The next prime is 716663. The reversal of 716661 is 166617.

716661 is nontrivially palindromic in base 2.

716661 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (716659) and next prime (716663).

It is not a de Polignac number, because 716661 - 2¹ = 716659 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

716661 is strictly pandigital in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (716663) 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, 5580 + ... + 5706.

It is an arithmetic number, because the mean of its divisors is an integer number (38400).

2⁷¹⁶⁶⁶¹ is an apocalyptic number.

It is an amenable number.

716661 is a deficient number, since it is larger than the sum of its proper divisors (512139).

716661 is a wasteful number, since it uses less digits than its factorization.

716661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166 (or 160 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 716661 is about 846.5583264017. The cubic root of 716661 is about 89.4893301055.

It can be divided in two parts, 7166 and 61, that added together give a palindrome (7227).

The spelling of 716661 in words is "seven hundred sixteen thousand, six hundred sixty-one".