666037273 has 8 divisors (see below), whose sum is σ = 740295936. Its totient is φ = 594063600.

The previous prime is 666037247. The next prime is 666037283. The reversal of 666037273 is 372730666.

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 666037273 - 2¹³ = 666029081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666037283) 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, 570633 + ... + 571798.

It is an arithmetic number, because the mean of its divisors is an integer number (92536992).

Almost surely, 2^666037273 is an apocalyptic number.

It is an amenable number.

666037273 is a deficient number, since it is larger than the sum of its proper divisors (74258663).

666037273 is a wasteful number, since it uses less digits than its factorization.

666037273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1142495.

The product of its (nonzero) digits is 190512, while the sum is 40.

The square root of 666037273 is about 25807.6979407308. The cubic root of 666037273 is about 873.3054651707.

The spelling of 666037273 in words is "six hundred sixty-six million, thirty-seven thousand, two hundred seventy-three".