66666683333340 has 36 divisors (see below), whose sum is σ = 202222272778344. Its totient is φ = 17777782222176.

The previous prime is 66666683333303. The next prime is 66666683333389. The reversal of 66666683333340 is 4333338666666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 185185231302 + ... + 185185231661.

It is an arithmetic number, because the mean of its divisors is an integer number (5617285354954).

Almost surely, 2^{66666683333340} is an apocalyptic number.

66666683333340 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66666683333340 is an abundant number, since it is smaller than the sum of its proper divisors (135555589445004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66666683333340 is a wasteful number, since it uses less digits than its factorization.

66666683333340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370370462978 (or 370370462973 counting only the distinct ones).

The product of its (nonzero) digits is 362797056, while the sum is 63.

The spelling of 66666683333340 in words is "sixty-six trillion, six hundred sixty-six billion, six hundred eighty-three million, three hundred thirty-three thousand, three hundred forty".