66042245542 has 24 divisors (see below), whose sum is σ = 122594062896. Its totient is φ = 26126601696.

The previous prime is 66042245539. The next prime is 66042245561. The reversal of 66042245542 is 24554224066.

66042245542 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 66042245495 and 66042245504.

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, 13954153 + ... + 13958884.

It is an arithmetic number, because the mean of its divisors is an integer number (5108085954).

Almost surely, 2^66042245542 is an apocalyptic number.

66042245542 is a deficient number, since it is larger than the sum of its proper divisors (56551817354).

66042245542 is a wasteful number, since it uses less digits than its factorization.

66042245542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27913072 (or 27913059 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 40.

The spelling of 66042245542 in words is "sixty-six billion, forty-two million, two hundred forty-five thousand, five hundred forty-two".