660436992133 has 4 divisors (see below), whose sum is σ = 660486628780. Its totient is φ = 660387355488.

The previous prime is 660436992121. The next prime is 660436992191. The reversal of 660436992133 is 331299634066.

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 216264061764 + 444172930369 = 465042^2 + 666463^2 .

It is a cyclic number.

It is not a de Polignac number, because 660436992133 - 2⁵ = 660436992101 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 (660436995133) 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, 24798360 + ... + 24824977.

It is an arithmetic number, because the mean of its divisors is an integer number (165121657195).

Almost surely, 2^660436992133 is an apocalyptic number.

It is an amenable number.

660436992133 is a deficient number, since it is larger than the sum of its proper divisors (49636647).

660436992133 is a wasteful number, since it uses less digits than its factorization.

660436992133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49636646.

The product of its (nonzero) digits is 3779136, while the sum is 52.

The spelling of 660436992133 in words is "six hundred sixty billion, four hundred thirty-six million, nine hundred ninety-two thousand, one hundred thirty-three".