66572542 has 16 divisors (see below), whose sum is σ = 105276240. Its totient is φ = 31485888.

The previous prime is 66572537. The next prime is 66572543. The reversal of 66572542 is 24527566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66572543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40888 + ... + 42484.

It is an arithmetic number, because the mean of its divisors is an integer number (6579765).

Almost surely, 2^66572542 is an apocalyptic number.

66572542 is a deficient number, since it is larger than the sum of its proper divisors (38703698).

66572542 is a wasteful number, since it uses less digits than its factorization.

66572542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2715.

The product of its digits is 100800, while the sum is 37.

The square root of 66572542 is about 8159.1998382194. The cubic root of 66572542 is about 405.2892147476.

The spelling of 66572542 in words is "sixty-six million, five hundred seventy-two thousand, five hundred forty-two".