66666770999 has 8 divisors (see below), whose sum is σ = 70190640000. Its totient is φ = 63144411192.

The previous prime is 66666770981. The next prime is 66666771001. The reversal of 66666770999 is 99907766666.

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 66666770999 - 2²⁰ = 66665722423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66666770299) 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, 286049 + ... + 463850.

It is an arithmetic number, because the mean of its divisors is an integer number (8773830000).

Almost surely, 2^66666770999 is an apocalyptic number.

66666770999 is a deficient number, since it is larger than the sum of its proper divisors (3523869001).

66666770999 is a wasteful number, since it uses less digits than its factorization.

66666770999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 754597.

The product of its (nonzero) digits is 277766496, while the sum is 71.

The spelling of 66666770999 in words is "sixty-six billion, six hundred sixty-six million, seven hundred seventy thousand, nine hundred ninety-nine".