791666 has 8 divisors (see below), whose sum is σ = 1192620. Its totient is φ = 394128.

The previous prime is 791663. The next prime is 791677. The reversal of 791666 is 666197.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 648025 + 143641 = 805^2 + 379^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 791666.

It is not an unprimeable number, because it can be changed into a prime (791663) 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, 161 + ... + 1268.

2⁷⁹¹⁶⁶⁶ is an apocalyptic number.

791666 is a deficient number, since it is larger than the sum of its proper divisors (400954).

791666 is a wasteful number, since it uses less digits than its factorization.

791666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1708.

The product of its digits is 13608, while the sum is 35.

The square root of 791666 is about 889.7561463682. The cubic root of 791666 is about 92.5082924146.

The spelling of 791666 in words is "seven hundred ninety-one thousand, six hundred sixty-six".