53666642 has 8 divisors (see below), whose sum is σ = 83096832. Its totient is φ = 25967700.

The previous prime is 53666629. The next prime is 53666677. The reversal of 53666642 is 24666635.

53666642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 53666596 and 53666605.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 432734 + ... + 432857.

It is an arithmetic number, because the mean of its divisors is an integer number (10387104).

Almost surely, 2^53666642 is an apocalyptic number.

53666642 is a deficient number, since it is larger than the sum of its proper divisors (29430190).

53666642 is a wasteful number, since it uses less digits than its factorization.

53666642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 865624.

The product of its digits is 155520, while the sum is 38.

The square root of 53666642 is about 7325.7519750535. The cubic root of 53666642 is about 377.1969223592.

The spelling of 53666642 in words is "fifty-three million, six hundred sixty-six thousand, six hundred forty-two".