5665267801961 has 4 divisors (see below), whose sum is σ = 5667043194624. Its totient is φ = 5663492409300.

The previous prime is 5665267801951. The next prime is 5665267801981. The reversal of 5665267801961 is 1691087625665.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5665267801961 - 2¹⁴ = 5665267785577 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5665267801894 and 5665267801903.

It is not an unprimeable number, because it can be changed into a prime (5665267801951) 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, 887691545 + ... + 887697926.

It is an arithmetic number, because the mean of its divisors is an integer number (1416760798656).

Almost surely, 2^{5665267801961} is an apocalyptic number.

It is an amenable number.

5665267801961 is a deficient number, since it is larger than the sum of its proper divisors (1775392663).

5665267801961 is a wasteful number, since it uses less digits than its factorization.

5665267801961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1775392662.

The product of its (nonzero) digits is 32659200, while the sum is 62.

The spelling of 5665267801961 in words is "five trillion, six hundred sixty-five billion, two hundred sixty-seven million, eight hundred one thousand, nine hundred sixty-one".