66131145652534 has 16 divisors (see below), whose sum is σ = 102617754789600. Its totient is φ = 31925237607424.

The previous prime is 66131145652531. The next prime is 66131145652573. The reversal of 66131145652534 is 43525654113166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66131145652531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11127414 + ... + 16002550.

It is an arithmetic number, because the mean of its divisors is an integer number (6413609674350).

Almost surely, 2^{66131145652534} is an apocalyptic number.

66131145652534 is a deficient number, since it is larger than the sum of its proper divisors (36486609137066).

66131145652534 is a wasteful number, since it uses less digits than its factorization.

66131145652534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5109047.

The product of its digits is 7776000, while the sum is 52.

The spelling of 66131145652534 in words is "sixty-six trillion, one hundred thirty-one billion, one hundred forty-five million, six hundred fifty-two thousand, five hundred thirty-four".