66637382 has 32 divisors (see below), whose sum is σ = 123923520. Its totient is φ = 26219520.

The previous prime is 66637381. The next prime is 66637409. The reversal of 66637382 is 28373666.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66637381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6344 + ... + 13172.

It is an arithmetic number, because the mean of its divisors is an integer number (3872610).

Almost surely, 2^66637382 is an apocalyptic number.

66637382 is a deficient number, since it is larger than the sum of its proper divisors (57286138).

66637382 is a wasteful number, since it uses less digits than its factorization.

66637382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6896.

The product of its digits is 217728, while the sum is 41.

The square root of 66637382 is about 8163.1723000314. The cubic root of 66637382 is about 405.4207525900.

The spelling of 66637382 in words is "sixty-six million, six hundred thirty-seven thousand, three hundred eighty-two".