66494446 has 16 divisors (see below), whose sum is σ = 105761376. Its totient is φ = 31246336.

The previous prime is 66494443. The next prime is 66494447. The reversal of 66494446 is 64449466.

It is a super-2 number, since 2×66494446² = 8843022697693832, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66494443) 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, 40575 + ... + 42181.

It is an arithmetic number, because the mean of its divisors is an integer number (6610086).

Almost surely, 2^66494446 is an apocalyptic number.

66494446 is a deficient number, since it is larger than the sum of its proper divisors (39266930).

66494446 is a wasteful number, since it uses less digits than its factorization.

66494446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2843.

The product of its digits is 497664, while the sum is 43.

The square root of 66494446 is about 8154.4126704503. The cubic root of 66494446 is about 405.1306716487.

The spelling of 66494446 in words is "sixty-six million, four hundred ninety-four thousand, four hundred forty-six".