66423546 has 48 divisors (see below), whose sum is σ = 165095424. Its totient is φ = 18906912.

The previous prime is 66423509. The next prime is 66423551. The reversal of 66423546 is 64532466.

66423546 is a `hidden beast` number, since 6 + 642 + 3 + 5 + 4 + 6 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 66423546.

It is a congruent number.

It is an unprimeable number.

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 in 23 ways as a sum of consecutive naturals, for example, 39111 + ... + 40773.

It is an arithmetic number, because the mean of its divisors is an integer number (3439488).

Almost surely, 2^66423546 is an apocalyptic number.

66423546 is an abundant number, since it is smaller than the sum of its proper divisors (98671878).

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

66423546 is a wasteful number, since it uses less digits than its factorization.

66423546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1995 (or 1992 counting only the distinct ones).

The product of its digits is 103680, while the sum is 36.

The square root of 66423546 is about 8150.0641715265. The cubic root of 66423546 is about 404.9866296455.

The spelling of 66423546 in words is "sixty-six million, four hundred twenty-three thousand, five hundred forty-six".