66156634664141 has 24 divisors (see below), whose sum is σ = 77103099079776. Its totient is φ = 56598576521760.

The previous prime is 66156634664111. The next prime is 66156634664147. The reversal of 66156634664141 is 14146643665166.

It is a happy number.

It is not a de Polignac number, because 66156634664141 - 2³⁰ = 66155560922317 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66156634664147) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 503482271 + ... + 503613651.

It is an arithmetic number, because the mean of its divisors is an integer number (3212629128324).

Almost surely, 2^{66156634664141} is an apocalyptic number.

It is an amenable number.

66156634664141 is a deficient number, since it is larger than the sum of its proper divisors (10946464415635).

66156634664141 is a wasteful number, since it uses less digits than its factorization.

66156634664141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150729 (or 150722 counting only the distinct ones).

The product of its digits is 44789760, while the sum is 59.

The spelling of 66156634664141 in words is "sixty-six trillion, one hundred fifty-six billion, six hundred thirty-four million, six hundred sixty-four thousand, one hundred forty-one".