66272263 has 4 divisors (see below), whose sum is σ = 67070808. Its totient is φ = 65473720.

The previous prime is 66272257. The next prime is 66272267. The reversal of 66272263 is 36227266.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 66272263 - 2²⁵ = 32717831 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66272267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 399148 + ... + 399313.

It is an arithmetic number, because the mean of its divisors is an integer number (16767702).

Almost surely, 2^66272263 is an apocalyptic number.

66272263 is a deficient number, since it is larger than the sum of its proper divisors (798545).

66272263 is an equidigital number, since it uses as much as digits as its factorization.

66272263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798544.

The product of its digits is 36288, while the sum is 34.

The square root of 66272263 is about 8140.7777883934. Note that the first 4 decimals coincide. The cubic root of 66272263 is about 404.6789367249.

The spelling of 66272263 in words is "sixty-six million, two hundred seventy-two thousand, two hundred sixty-three".