66432428 has 12 divisors (see below), whose sum is σ = 117894672. Its totient is φ = 32748240.

The previous prime is 66432397. The next prime is 66432437. The reversal of 66432428 is 82423466.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

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 3 ways as a sum of consecutive naturals, for example, 116675 + ... + 117242.

It is an arithmetic number, because the mean of its divisors is an integer number (9824556).

Almost surely, 2^66432428 is an apocalyptic number.

It is an amenable number.

66432428 is a deficient number, since it is larger than the sum of its proper divisors (51462244).

66432428 is a wasteful number, since it uses less digits than its factorization.

66432428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233992 (or 233990 counting only the distinct ones).

The product of its digits is 55296, while the sum is 35.

The square root of 66432428 is about 8150.6090569969. The cubic root of 66432428 is about 405.0046801268.

The spelling of 66432428 in words is "sixty-six million, four hundred thirty-two thousand, four hundred twenty-eight".