66103523213461 has 4 divisors (see below), whose sum is σ = 66608130261024. Its totient is φ = 65598916165900.

The previous prime is 66103523213419. The next prime is 66103523213513. The reversal of 66103523213461 is 16431232530166.

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 66103523213461 - 2²⁵ = 66103489659029 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 (66103523213261) 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, 252303523585 + ... + 252303523846.

It is an arithmetic number, because the mean of its divisors is an integer number (16652032565256).

Almost surely, 2^{66103523213461} is an apocalyptic number.

It is an amenable number.

66103523213461 is a deficient number, since it is larger than the sum of its proper divisors (504607047563).

66103523213461 is a wasteful number, since it uses less digits than its factorization.

66103523213461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504607047562.

The product of its (nonzero) digits is 466560, while the sum is 43.

The spelling of 66103523213461 in words is "sixty-six trillion, one hundred three billion, five hundred twenty-three million, two hundred thirteen thousand, four hundred sixty-one".