66707222 has 8 divisors (see below), whose sum is σ = 104411376. Its totient is φ = 31903432.

The previous prime is 66707219. The next prime is 66707227. The reversal of 66707222 is 22270766.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66707227) 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, 725033 + ... + 725124.

It is an arithmetic number, because the mean of its divisors is an integer number (13051422).

Almost surely, 2^66707222 is an apocalyptic number.

66707222 is a deficient number, since it is larger than the sum of its proper divisors (37704154).

66707222 is a wasteful number, since it uses less digits than its factorization.

66707222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1450182.

The product of its (nonzero) digits is 14112, while the sum is 32.

The square root of 66707222 is about 8167.4489285211. The cubic root of 66707222 is about 405.5623382810.

Adding to 66707222 its reverse (22270766), we get a palindrome (88977988).

The spelling of 66707222 in words is "sixty-six million, seven hundred seven thousand, two hundred twenty-two".