66320946 has 24 divisors (see below), whose sum is σ = 147580524. Its totient is φ = 21509280.

The previous prime is 66320911. The next prime is 66320959. The reversal of 66320946 is 64902366.

It can be written as a sum of positive squares in 2 ways, for example, as 54686025 + 11634921 = 7395^2 + 3411^2 .

It is a plaindrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 66320946.

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 11 ways as a sum of consecutive naturals, for example, 49125 + ... + 50456.

Almost surely, 2^66320946 is an apocalyptic number.

66320946 is an abundant number, since it is smaller than the sum of its proper divisors (81259578).

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

66320946 is a wasteful number, since it uses less digits than its factorization.

66320946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99626 (or 99623 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 36.

The square root of 66320946 is about 8143.7673100353. The cubic root of 66320946 is about 404.7780036231.

It can be divided in two parts, 663 and 20946, that added together give a square (21609 = 147²).

The spelling of 66320946 in words is "sixty-six million, three hundred twenty thousand, nine hundred forty-six".