66031113724542 has 24 divisors (see below), whose sum is σ = 143070211043760. Its totient is φ = 22009940784000.

The previous prime is 66031113724523. The next prime is 66031113724559. The reversal of 66031113724542 is 24542731113066.

66031113724542 is a `hidden beast` number, since 6 + 6 + 0 + 31 + 1 + 1 + 3 + 72 + 4 + 542 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34924834 + ... + 36766917.

It is an arithmetic number, because the mean of its divisors is an integer number (5961258793490).

Almost surely, 2^{66031113724542} is an apocalyptic number.

66031113724542 is an abundant number, since it is smaller than the sum of its proper divisors (77039097319218).

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

66031113724542 is a wasteful number, since it uses less digits than its factorization.

66031113724542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71742928 (or 71742925 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The spelling of 66031113724542 in words is "sixty-six trillion, thirty-one billion, one hundred thirteen million, seven hundred twenty-four thousand, five hundred forty-two".