7220766 has 16 divisors (see below), whose sum is σ = 16504704. Its totient is φ = 2063064.

The previous prime is 7220761. The next prime is 7220789. The reversal of 7220766 is 6670227.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7220761) 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, 85920 + ... + 86003.

It is an arithmetic number, because the mean of its divisors is an integer number (1031544).

Almost surely, 2^7220766 is an apocalyptic number.

7220766 is an abundant number, since it is smaller than the sum of its proper divisors (9283938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7220766 is a wasteful number, since it uses less digits than its factorization.

7220766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171935.

The product of its (nonzero) digits is 7056, while the sum is 30.

The square root of 7220766 is about 2687.1483025691. The cubic root of 7220766 is about 193.2833408856.

The spelling of 7220766 in words is "seven million, two hundred twenty thousand, seven hundred sixty-six".