66905020713 has 8 divisors (see below), whose sum is σ = 91104709248. Its totient is φ = 43654339664.

The previous prime is 66905020703. The next prime is 66905020729. The reversal of 66905020713 is 31702050966.

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 66905020713 - 2¹³ = 66905012521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66905020703) 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, 237251706 + ... + 237251987.

It is an arithmetic number, because the mean of its divisors is an integer number (11388088656).

Almost surely, 2^66905020713 is an apocalyptic number.

It is an amenable number.

66905020713 is a deficient number, since it is larger than the sum of its proper divisors (24199688535).

66905020713 is a wasteful number, since it uses less digits than its factorization.

66905020713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474503743.

The product of its (nonzero) digits is 68040, while the sum is 39.

The spelling of 66905020713 in words is "sixty-six billion, nine hundred five million, twenty thousand, seven hundred thirteen".