66572273 has 8 divisors (see below), whose sum is σ = 67918080. Its totient is φ = 65239200.

The previous prime is 66572269. The next prime is 66572279. The reversal of 66572273 is 37227566.

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 66572273 - 2² = 66572269 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66572279) 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, 7748 + ... + 13898.

It is an arithmetic number, because the mean of its divisors is an integer number (8489760).

Almost surely, 2^66572273 is an apocalyptic number.

It is an amenable number.

66572273 is a deficient number, since it is larger than the sum of its proper divisors (1345807).

66572273 is a wasteful number, since it uses less digits than its factorization.

66572273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6367.

The product of its digits is 105840, while the sum is 38.

The square root of 66572273 is about 8159.1833537432. The cubic root of 66572273 is about 405.2886688622.

The spelling of 66572273 in words is "sixty-six million, five hundred seventy-two thousand, two hundred seventy-three".