766643222 has 16 divisors (see below), whose sum is σ = 1200890880. Its totient is φ = 366372072.

The previous prime is 766643221. The next prime is 766643231. The reversal of 766643222 is 222346667.

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 (766643221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61403 + ... + 72825.

It is an arithmetic number, because the mean of its divisors is an integer number (75055680).

Almost surely, 2^766643222 is an apocalyptic number.

766643222 is a deficient number, since it is larger than the sum of its proper divisors (434247658).

766643222 is a wasteful number, since it uses less digits than its factorization.

766643222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12907.

The product of its digits is 145152, while the sum is 38.

The square root of 766643222 is about 27688.3228455607. The cubic root of 766643222 is about 915.2317973061.

Adding to 766643222 its reverse (222346667), we get a palindrome (988989889).

The spelling of 766643222 in words is "seven hundred sixty-six million, six hundred forty-three thousand, two hundred twenty-two".