65722266 has 28 divisors (see below), whose sum is σ = 147810762. Its totient is φ = 21906936.

The previous prime is 65722259. The next prime is 65722271. The reversal of 65722266 is 66222756.

65722266 is a `hidden beast` number, since 6 + 572 + 22 + 66 = 666.

It can be written as a sum of positive squares in only one way, i.e., 54331641 + 11390625 = 7371^2 + 3375^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 65722266.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 21081 + ... + 23996.

Almost surely, 2^65722266 is an apocalyptic number.

65722266 is an abundant number, since it is smaller than the sum of its proper divisors (82088496).

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

65722266 is an equidigital number, since it uses as much as digits as its factorization.

65722266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45097 (or 45082 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 65722266 is about 8106.9270380336. The cubic root of 65722266 is about 403.5563415473.

The spelling of 65722266 in words is "sixty-five million, seven hundred twenty-two thousand, two hundred sixty-six".