710661 has 16 divisors (see below), whose sum is σ = 1109504. Its totient is φ = 396144.

The previous prime is 710641. The next prime is 710663. The reversal of 710661 is 166017.

It is not a de Polignac number, because 710661 - 2¹³ = 702469 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (710663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 510 + ... + 1296.

It is an arithmetic number, because the mean of its divisors is an integer number (69344).

2⁷¹⁰⁶⁶¹ is an apocalyptic number.

It is an amenable number.

710661 is a deficient number, since it is larger than the sum of its proper divisors (398843).

710661 is a wasteful number, since it uses less digits than its factorization.

710661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840.

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 710661 is about 843.0071174077. The cubic root of 710661 is about 89.2388902522.

Adding to 710661 its reverse (166017), we get a palindrome (876678).

Subtracting from 710661 its reverse (166017), we obtain a square (544644 = 738²).

The spelling of 710661 in words is "seven hundred ten thousand, six hundred sixty-one".