66375047 has 8 divisors (see below), whose sum is σ = 67023600. Its totient is φ = 65729664.

The previous prime is 66375019. The next prime is 66375073. The reversal of 66375047 is 74057366.

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

It is a cyclic number.

It is not a de Polignac number, because 66375047 - 2¹⁰ = 66374023 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66375047.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66375347) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65279 + ... + 66287.

It is an arithmetic number, because the mean of its divisors is an integer number (8377950).

Almost surely, 2^66375047 is an apocalyptic number.

66375047 is a deficient number, since it is larger than the sum of its proper divisors (648553).

66375047 is a wasteful number, since it uses less digits than its factorization.

66375047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1585.

The product of its (nonzero) digits is 105840, while the sum is 38.

The square root of 66375047 is about 8147.0882528668. The cubic root of 66375047 is about 404.8880389596. Note that the first 3 decimals are identical.

The spelling of 66375047 in words is "sixty-six million, three hundred seventy-five thousand, forty-seven".