66416746 has 16 divisors (see below), whose sum is σ = 109407168. Its totient is φ = 29988000.

The previous prime is 66416741. The next prime is 66416747. The reversal of 66416746 is 64761466.

It is a happy number.

It is a super-2 number, since 2×66416746² = 8822368298457032, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66416699 and 66416708.

It is not an unprimeable number, because it can be changed into a prime (66416741) 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, 6675 + ... + 13318.

It is an arithmetic number, because the mean of its divisors is an integer number (6837948).

Almost surely, 2^66416746 is an apocalyptic number.

66416746 is a deficient number, since it is larger than the sum of its proper divisors (42990422).

66416746 is a wasteful number, since it uses less digits than its factorization.

66416746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20157.

The product of its digits is 145152, while the sum is 40.

The square root of 66416746 is about 8149.6469862197. The cubic root of 66416746 is about 404.9728092297.

The spelling of 66416746 in words is "sixty-six million, four hundred sixteen thousand, seven hundred forty-six".