66156320323532 has 12 divisors (see below), whose sum is σ = 115775518565616. Its totient is φ = 33077600733360.

The previous prime is 66156320323507. The next prime is 66156320323543. The reversal of 66156320323532 is 23532302365166.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139590968 + ... + 140064095.

It is an arithmetic number, because the mean of its divisors is an integer number (9647959880468).

Almost surely, 2^{66156320323532} is an apocalyptic number.

It is an amenable number.

66156320323532 is a deficient number, since it is larger than the sum of its proper divisors (49619198242084).

66156320323532 is a wasteful number, since it uses less digits than its factorization.

66156320323532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279714208 (or 279714206 counting only the distinct ones).

The product of its (nonzero) digits is 3499200, while the sum is 47.

Adding to 66156320323532 its reverse (23532302365166), we get a palindrome (89688622688698).

The spelling of 66156320323532 in words is "sixty-six trillion, one hundred fifty-six billion, three hundred twenty million, three hundred twenty-three thousand, five hundred thirty-two".