66222045 has 48 divisors (see below), whose sum is σ = 121784832. Its totient is φ = 33229440.

The previous prime is 66222019. The next prime is 66222053. The reversal of 66222045 is 54022266.

It is not a de Polignac number, because 66222045 - 2⁷ = 66221917 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 50974 + ... + 52256.

It is an arithmetic number, because the mean of its divisors is an integer number (2537184).

Almost surely, 2^66222045 is an apocalyptic number.

It is an amenable number.

66222045 is a deficient number, since it is larger than the sum of its proper divisors (55562787).

66222045 is a wasteful number, since it uses less digits than its factorization.

66222045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1362 (or 1359 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 66222045 is about 8137.6928548576. The cubic root of 66222045 is about 404.5766953490.

It can be divided in two parts, 66 and 222045, that added together give a triangular number (222111 = T₆₆₆).

The spelling of 66222045 in words is "sixty-six million, two hundred twenty-two thousand, forty-five".