1666272873 has 8 divisors (see below), whose sum is σ = 2234109600. Its totient is φ = 1104642368.

The previous prime is 1666272827. The next prime is 1666272899. The reversal of 1666272873 is 3782726661.

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

It is a cyclic number.

It is not a de Polignac number, because 1666272873 - 2⁶ = 1666272809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1666272073) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1550928 + ... + 1552001.

It is an arithmetic number, because the mean of its divisors is an integer number (279263700).

Almost surely, 2^1666272873 is an apocalyptic number.

It is an amenable number.

1666272873 is a deficient number, since it is larger than the sum of its proper divisors (567836727).

1666272873 is a wasteful number, since it uses less digits than its factorization.

1666272873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3103111.

The product of its digits is 1016064, while the sum is 48.

The square root of 1666272873 is about 40820.0057937282. The cubic root of 1666272873 is about 1185.5377153376.

The spelling of 1666272873 in words is "one billion, six hundred sixty-six million, two hundred seventy-two thousand, eight hundred seventy-three".