66156231660546 has 8 divisors (see below), whose sum is σ = 132312463321104. Its totient is φ = 22052077220180.

The previous prime is 66156231660529. The next prime is 66156231660553. The reversal of 66156231660546 is 64506613265166.

It is a sphenic number, since it is the product of 3 distinct primes.

66156231660546 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5513019305040 + ... + 5513019305051.

It is an arithmetic number, because the mean of its divisors is an integer number (16539057915138).

Almost surely, 2^{66156231660546} is an apocalyptic number.

66156231660546 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66156231660546 is a wasteful number, since it uses less digits than its factorization.

66156231660546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11026038610096.

The product of its (nonzero) digits is 27993600, while the sum is 57.

The spelling of 66156231660546 in words is "sixty-six trillion, one hundred fifty-six billion, two hundred thirty-one million, six hundred sixty thousand, five hundred forty-six".