66850538 has 8 divisors (see below), whose sum is σ = 100891488. Its totient is φ = 33220044.

The previous prime is 66850519. The next prime is 66850559. The reversal of 66850538 is 83505866.

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 = 66850495 and 66850504.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102206 + ... + 102857.

It is an arithmetic number, because the mean of its divisors is an integer number (12611436).

Almost surely, 2^66850538 is an apocalyptic number.

66850538 is a deficient number, since it is larger than the sum of its proper divisors (34040950).

66850538 is a wasteful number, since it uses less digits than its factorization.

66850538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205228.

The product of its (nonzero) digits is 172800, while the sum is 41.

The square root of 66850538 is about 8176.2178297792. The cubic root of 66850538 is about 405.8525717073.

The spelling of 66850538 in words is "sixty-six million, eight hundred fifty thousand, five hundred thirty-eight".