66259945801 has 8 divisors (see below), whose sum is σ = 76122123264. Its totient is φ = 56496886080.

The previous prime is 66259945777. The next prime is 66259945823. The reversal of 66259945801 is 10854995266.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66259945801 - 2⁷ = 66259945673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66259945831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24778000 + ... + 24780673.

It is an arithmetic number, because the mean of its divisors is an integer number (9515265408).

Almost surely, 2^66259945801 is an apocalyptic number.

It is an amenable number.

66259945801 is a deficient number, since it is larger than the sum of its proper divisors (9862177463).

66259945801 is a wasteful number, since it uses less digits than its factorization.

66259945801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49558871.

The product of its (nonzero) digits is 4665600, while the sum is 55.

The spelling of 66259945801 in words is "sixty-six billion, two hundred fifty-nine million, nine hundred forty-five thousand, eight hundred one".