731666722 has 8 divisors (see below), whose sum is σ = 1098879516. Its totient is φ = 365373552.

The previous prime is 731666699. The next prime is 731666753. The reversal of 731666722 is 227666137.

It can be written as a sum of positive squares in 2 ways, for example, as 679697041 + 51969681 = 26071^2 + 7209^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 227913 + ... + 231100.

Almost surely, 2^731666722 is an apocalyptic number.

731666722 is a deficient number, since it is larger than the sum of its proper divisors (367212794).

731666722 is a wasteful number, since it uses less digits than its factorization.

731666722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459812.

The product of its digits is 127008, while the sum is 40.

The square root of 731666722 is about 27049.3386610468. The cubic root of 731666722 is about 901.0960810372.

The spelling of 731666722 in words is "seven hundred thirty-one million, six hundred sixty-six thousand, seven hundred twenty-two".