66069542 has 48 divisors (see below), whose sum is σ = 126862848. Its totient is φ = 25517520.

The previous prime is 66069541. The next prime is 66069581. The reversal of 66069542 is 24596066.

It is a junction number, because it is equal to n+sod(n) for n = 66069496 and 66069505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66069541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 179843 + ... + 180209.

It is an arithmetic number, because the mean of its divisors is an integer number (2642976).

Almost surely, 2^66069542 is an apocalyptic number.

66069542 is a deficient number, since it is larger than the sum of its proper divisors (60793306).

66069542 is a wasteful number, since it uses less digits than its factorization.

66069542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561 (or 554 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 66069542 is about 8128.3172920353. The cubic root of 66069542 is about 404.2658895699.

The spelling of 66069542 in words is "sixty-six million, sixty-nine thousand, five hundred forty-two".