7221266764 has 24 divisors (see below), whose sum is σ = 13035500240. Its totient is φ = 3497691456.

The previous prime is 7221266761. The next prime is 7221266831. The reversal of 7221266764 is 4676621227.

It is a self number, because there is not a number n which added to its sum of digits gives 7221266764.

It is not an unprimeable number, because it can be changed into a prime (7221266761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72642 + ... + 140425.

Almost surely, 2^7221266764 is an apocalyptic number.

7221266764 is a gapful number since it is divisible by the number (74) formed by its first and last digit.

It is an amenable number.

7221266764 is a deficient number, since it is larger than the sum of its proper divisors (5814233476).

7221266764 is a wasteful number, since it uses less digits than its factorization.

7221266764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213337 (or 213335 counting only the distinct ones).

The product of its digits is 338688, while the sum is 43.

The square root of 7221266764 is about 84978.0369507322. The cubic root of 7221266764 is about 1932.8780888347.

The spelling of 7221266764 in words is "seven billion, two hundred twenty-one million, two hundred sixty-six thousand, seven hundred sixty-four".