7664222 has 4 divisors (see below), whose sum is σ = 11496336. Its totient is φ = 3832110.

The previous prime is 7664219. The next prime is 7664227. The reversal of 7664222 is 2224667.

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

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7664227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1916054 + ... + 1916057.

It is an arithmetic number, because the mean of its divisors is an integer number (2874084).

Almost surely, 2^7664222 is an apocalyptic number.

7664222 is a deficient number, since it is larger than the sum of its proper divisors (3832114).

7664222 is a wasteful number, since it uses less digits than its factorization.

7664222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3832113.

The product of its digits is 8064, while the sum is 29.

The square root of 7664222 is about 2768.4331308522. The cubic root of 7664222 is about 197.1617625722.

Adding to 7664222 its reverse (2224667), we get a palindrome (9888889).

The spelling of 7664222 in words is "seven million, six hundred sixty-four thousand, two hundred twenty-two".