1666748222 has 8 divisors (see below), whose sum is σ = 2608823376. Its totient is φ = 797140432.

The previous prime is 1666748219. The next prime is 1666748231. The reversal of 1666748222 is 2228476661.

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

It is a super-2 number, since 2×1666748222² = 5556099271080322568, which contains 22 as substring.

It is a congruent number.

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, 18116783 + ... + 18116874.

It is an arithmetic number, because the mean of its divisors is an integer number (326102922).

Almost surely, 2^1666748222 is an apocalyptic number.

1666748222 is a deficient number, since it is larger than the sum of its proper divisors (942075154).

1666748222 is a wasteful number, since it uses less digits than its factorization.

1666748222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36233682.

The product of its digits is 387072, while the sum is 44.

The square root of 1666748222 is about 40825.8278789298. The cubic root of 1666748222 is about 1185.6504400892.

The spelling of 1666748222 in words is "one billion, six hundred sixty-six million, seven hundred forty-eight thousand, two hundred twenty-two".