133966670693 has 4 divisors (see below), whose sum is σ = 137234150508. Its totient is φ = 130699190880.

The previous prime is 133966670623. The next prime is 133966670713. The reversal of 133966670693 is 396076669331.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1679524324 + 132287146369 = 40982^2 + 363713^2 .

It is a cyclic number.

It is not a de Polignac number, because 133966670693 - 2¹⁸ = 133966408549 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133966670623) 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, 1633739846 + ... + 1633739927.

It is an arithmetic number, because the mean of its divisors is an integer number (34308537627).

Almost surely, 2^133966670693 is an apocalyptic number.

It is an amenable number.

133966670693 is a deficient number, since it is larger than the sum of its proper divisors (3267479815).

133966670693 is an equidigital number, since it uses as much as digits as its factorization.

133966670693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3267479814.

The product of its (nonzero) digits is 19840464, while the sum is 59.

The spelling of 133966670693 in words is "one hundred thirty-three billion, nine hundred sixty-six million, six hundred seventy thousand, six hundred ninety-three".