133935772666 has 4 divisors (see below), whose sum is σ = 200903659002. Its totient is φ = 66967886332.

The previous prime is 133935772589. The next prime is 133935772679. The reversal of 133935772666 is 666277539331.

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

It can be written as a sum of positive squares in only one way, i.e., 126152122041 + 7783650625 = 355179^2 + 88225^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 133935772666.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33483943165 + ... + 33483943168.

Almost surely, 2^133935772666 is an apocalyptic number.

133935772666 is a deficient number, since it is larger than the sum of its proper divisors (66967886336).

133935772666 is an equidigital number, since it uses as much as digits as its factorization.

133935772666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66967886335.

The product of its digits is 25719120, while the sum is 58.

The spelling of 133935772666 in words is "one hundred thirty-three billion, nine hundred thirty-five million, seven hundred seventy-two thousand, six hundred sixty-six".