66013643901 has 8 divisors (see below), whose sum is σ = 88840792224. Its totient is φ = 43597795760.

The previous prime is 66013643819. The next prime is 66013643911. The reversal of 66013643901 is 10934631066.

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 66013643901 - 2²¹ = 66011546749 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66013643901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66013643911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102824670 + ... + 102825311.

It is an arithmetic number, because the mean of its divisors is an integer number (11105099028).

Almost surely, 2^66013643901 is an apocalyptic number.

It is an amenable number.

66013643901 is a deficient number, since it is larger than the sum of its proper divisors (22827148323).

66013643901 is a wasteful number, since it uses less digits than its factorization.

66013643901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205650091.

The product of its (nonzero) digits is 69984, while the sum is 39.

The spelling of 66013643901 in words is "sixty-six billion, thirteen million, six hundred forty-three thousand, nine hundred one".