66917953514 has 8 divisors (see below), whose sum is σ = 101099066880. Its totient is φ = 33218264556.

The previous prime is 66917953499. The next prime is 66917953517. The reversal of 66917953514 is 41535971966.

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

It is a self number, because there is not a number n which added to its sum of digits gives 66917953514.

It is not an unprimeable number, because it can be changed into a prime (66917953517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120355754 + ... + 120356309.

It is an arithmetic number, because the mean of its divisors is an integer number (12637383360).

Almost surely, 2^66917953514 is an apocalyptic number.

66917953514 is a deficient number, since it is larger than the sum of its proper divisors (34181113366).

66917953514 is a wasteful number, since it uses less digits than its factorization.

66917953514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240712204.

The product of its digits is 6123600, while the sum is 56.

The spelling of 66917953514 in words is "sixty-six billion, nine hundred seventeen million, nine hundred fifty-three thousand, five hundred fourteen".