661482266 has 8 divisors (see below), whose sum is σ = 997260660. Its totient is φ = 329062048.

The previous prime is 661482209. The next prime is 661482293. The reversal of 661482266 is 662284166.

It can be written as a sum of positive squares in 2 ways, for example, as 557951641 + 103530625 = 23621^2 + 10175^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 839051 + ... + 839838.

Almost surely, 2^661482266 is an apocalyptic number.

661482266 is a deficient number, since it is larger than the sum of its proper divisors (335778394).

661482266 is a wasteful number, since it uses less digits than its factorization.

661482266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1679088.

The product of its digits is 165888, while the sum is 41.

The square root of 661482266 is about 25719.2975409516. The cubic root of 661482266 is about 871.3100736455.

The spelling of 661482266 in words is "six hundred sixty-one million, four hundred eighty-two thousand, two hundred sixty-six".