66943622 has 4 divisors (see below), whose sum is σ = 100415436. Its totient is φ = 33471810.

The previous prime is 66943621. The next prime is 66943627. The reversal of 66943622 is 22634966.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66943621) by changing a digit.

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 as a sum of consecutive naturals, namely, 16735904 + ... + 16735907.

It is an arithmetic number, because the mean of its divisors is an integer number (25103859).

Almost surely, 2^66943622 is an apocalyptic number.

66943622 is a deficient number, since it is larger than the sum of its proper divisors (33471814).

66943622 is a wasteful number, since it uses less digits than its factorization.

66943622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33471813.

The product of its digits is 93312, while the sum is 38.

The square root of 66943622 is about 8181.9082126360. The cubic root of 66943622 is about 406.0408567036.

The spelling of 66943622 in words is "sixty-six million, nine hundred forty-three thousand, six hundred twenty-two".