6509166722 has 4 divisors (see below), whose sum is σ = 9763750086. Its totient is φ = 3254583360.

The previous prime is 6509166637. The next prime is 6509166743. The reversal of 6509166722 is 2276619056.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 6054240481 + 454926241 = 77809^2 + 21329^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1627291679 + ... + 1627291682.

Almost surely, 2^6509166722 is an apocalyptic number.

6509166722 is a deficient number, since it is larger than the sum of its proper divisors (3254583364).

6509166722 is a wasteful number, since it uses less digits than its factorization.

6509166722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3254583363.

The product of its (nonzero) digits is 272160, while the sum is 44.

The square root of 6509166722 is about 80679.4070503744. The cubic root of 6509166722 is about 1867.1324712472.

The spelling of 6509166722 in words is "six billion, five hundred nine million, one hundred sixty-six thousand, seven hundred twenty-two".