55665246121 has 4 divisors (see below), whose sum is σ = 56449263744. Its totient is φ = 54881228500.

The previous prime is 55665246103. The next prime is 55665246173. The reversal of 55665246121 is 12164256655.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12164256655 = 5 ⋅2432851331.

It is a cyclic number.

It is not a de Polignac number, because 55665246121 - 2¹¹ = 55665244073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55665246521) 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, 392008705 + ... + 392008846.

It is an arithmetic number, because the mean of its divisors is an integer number (14112315936).

Almost surely, 2^55665246121 is an apocalyptic number.

It is an amenable number.

55665246121 is a deficient number, since it is larger than the sum of its proper divisors (784017623).

55665246121 is an equidigital number, since it uses as much as digits as its factorization.

55665246121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 784017622.

The product of its digits is 432000, while the sum is 43.

The spelling of 55665246121 in words is "fifty-five billion, six hundred sixty-five million, two hundred forty-six thousand, one hundred twenty-one".