66003123025101 has 4 divisors (see below), whose sum is σ = 88004164033472. Its totient is φ = 44002082016732.

The previous prime is 66003123025097. The next prime is 66003123025109. The reversal of 66003123025101 is 10152032130066.

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 not a de Polignac number, because 66003123025101 - 2² = 66003123025097 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 (66003123025109) 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, 11000520504181 + ... + 11000520504186.

It is an arithmetic number, because the mean of its divisors is an integer number (22001041008368).

Almost surely, 2^{66003123025101} is an apocalyptic number.

It is an amenable number.

66003123025101 is a deficient number, since it is larger than the sum of its proper divisors (22001041008371).

66003123025101 is a wasteful number, since it uses less digits than its factorization.

66003123025101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22001041008370.

The product of its (nonzero) digits is 6480, while the sum is 30.

Adding to 66003123025101 its reverse (10152032130066), we get a palindrome (76155155155167).

The spelling of 66003123025101 in words is "sixty-six trillion, three billion, one hundred twenty-three million, twenty-five thousand, one hundred one".