66746808 has 32 divisors (see below), whose sum is σ = 185408400. Its totient is φ = 22248864.

The previous prime is 66746803. The next prime is 66746831. The reversal of 66746808 is 80864766.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66746803) 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 in 7 ways as a sum of consecutive naturals, for example, 154291 + ... + 154722.

Almost surely, 2^66746808 is an apocalyptic number.

It is an amenable number.

66746808 is an abundant number, since it is smaller than the sum of its proper divisors (118661592).

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

66746808 is a wasteful number, since it uses less digits than its factorization.

66746808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309028 (or 309018 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The square root of 66746808 is about 8169.8719696211. The cubic root of 66746808 is about 405.6425465679.

The spelling of 66746808 in words is "sixty-six million, seven hundred forty-six thousand, eight hundred eight".