133573740665 has 4 divisors (see below), whose sum is σ = 160288488804. Its totient is φ = 106858992528.

The previous prime is 133573740611. The next prime is 133573740679. The reversal of 133573740665 is 566047375331.

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 64406318656 + 69167422009 = 253784^2 + 262997^2 .

It is a cyclic number.

It is not a de Polignac number, because 133573740665 - 2¹⁴ = 133573724281 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13357374062 + ... + 13357374071.

It is an arithmetic number, because the mean of its divisors is an integer number (40072122201).

Almost surely, 2^133573740665 is an apocalyptic number.

It is an amenable number.

133573740665 is a deficient number, since it is larger than the sum of its proper divisors (26714748139).

133573740665 is an equidigital number, since it uses as much as digits as its factorization.

133573740665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26714748138.

The product of its (nonzero) digits is 4762800, while the sum is 50.

The spelling of 133573740665 in words is "one hundred thirty-three billion, five hundred seventy-three million, seven hundred forty thousand, six hundred sixty-five".