7566033412661 has 4 divisors (see below), whose sum is σ = 7566039690924. Its totient is φ = 7566027134400.

The previous prime is 7566033412621. The next prime is 7566033412687. The reversal of 7566033412661 is 1662143306657.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 931622622436 + 6634410790225 = 965206^2 + 2575735^2 .

It is a cyclic number.

It is not a de Polignac number, because 7566033412661 - 2³⁸ = 7291155505717 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 (7566033412601) 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, 699410 + ... + 3952371.

It is an arithmetic number, because the mean of its divisors is an integer number (1891509922731).

Almost surely, 2^{7566033412661} is an apocalyptic number.

It is an amenable number.

7566033412661 is a deficient number, since it is larger than the sum of its proper divisors (6278263).

7566033412661 is a wasteful number, since it uses less digits than its factorization.

7566033412661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6278262.

The product of its (nonzero) digits is 3265920, while the sum is 50.

The spelling of 7566033412661 in words is "seven trillion, five hundred sixty-six billion, thirty-three million, four hundred twelve thousand, six hundred sixty-one".