66519142 has 4 divisors (see below), whose sum is σ = 99778716. Its totient is φ = 33259570.

The previous prime is 66519121. The next prime is 66519143. The reversal of 66519142 is 24191566.

66519142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 66519098 and 66519107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66519143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16629784 + ... + 16629787.

It is an arithmetic number, because the mean of its divisors is an integer number (24944679).

Almost surely, 2^66519142 is an apocalyptic number.

66519142 is a deficient number, since it is larger than the sum of its proper divisors (33259574).

66519142 is a wasteful number, since it uses less digits than its factorization.

66519142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33259573.

The product of its digits is 12960, while the sum is 34.

The square root of 66519142 is about 8155.9268020256. The cubic root of 66519142 is about 405.1808205423.

The spelling of 66519142 in words is "sixty-six million, five hundred nineteen thousand, one hundred forty-two".