66238446 has 48 divisors (see below), whose sum is σ = 142701264. Its totient is φ = 20487168.

The previous prime is 66238441. The next prime is 66238451. The reversal of 66238446 is 64483266.

It is an interprime number because it is at equal distance from previous prime (66238441) and next prime (66238451).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66238441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 114510 + ... + 115086.

It is an arithmetic number, because the mean of its divisors is an integer number (2972943).

Almost surely, 2^66238446 is an apocalyptic number.

66238446 is an abundant number, since it is smaller than the sum of its proper divisors (76462818).

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

66238446 is a wasteful number, since it uses less digits than its factorization.

66238446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 673 (or 654 counting only the distinct ones).

The product of its digits is 165888, while the sum is 39.

The square root of 66238446 is about 8138.7005105238. The cubic root of 66238446 is about 404.6100926598.

The spelling of 66238446 in words is "sixty-six million, two hundred thirty-eight thousand, four hundred forty-six".