66750801 has 16 divisors (see below), whose sum is σ = 96929280. Its totient is φ = 40613760.

The previous prime is 66750793. The next prime is 66750811. The reversal of 66750801 is 10805766.

It is not a de Polignac number, because 66750801 - 2³ = 66750793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66750811) 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, 6145 + ... + 13086.

It is an arithmetic number, because the mean of its divisors is an integer number (6058080).

Almost surely, 2^66750801 is an apocalyptic number.

It is an amenable number.

66750801 is a deficient number, since it is larger than the sum of its proper divisors (30178479).

66750801 is a wasteful number, since it uses less digits than its factorization.

66750801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19336.

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 66750801 is about 8170.1163394410. The cubic root of 66750801 is about 405.6506353362.

The spelling of 66750801 in words is "sixty-six million, seven hundred fifty thousand, eight hundred one".