1660722266 has 32 divisors (see below), whose sum is σ = 2974261248. Its totient is φ = 680465520.

The previous prime is 1660722253. The next prime is 1660722269. The reversal of 1660722266 is 6622270661.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1660722269) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 12971 + ... + 59073.

It is an arithmetic number, because the mean of its divisors is an integer number (92945664).

Almost surely, 2^1660722266 is an apocalyptic number.

1660722266 is a deficient number, since it is larger than the sum of its proper divisors (1313538982).

1660722266 is a wasteful number, since it uses less digits than its factorization.

1660722266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46226.

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 1660722266 is about 40751.9602718691. The cubic root of 1660722266 is about 1184.2198490925.

The spelling of 1660722266 in words is "one billion, six hundred sixty million, seven hundred twenty-two thousand, two hundred sixty-six".