66225947 has 8 divisors (see below), whose sum is σ = 70791840. Its totient is φ = 61800640.

The previous prime is 66225919. The next prime is 66225959. The reversal of 66225947 is 74952266.

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 66225947 - 2¹⁸ = 65963803 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66225997) 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, 34172 + ... + 36057.

It is an arithmetic number, because the mean of its divisors is an integer number (8848980).

Almost surely, 2^66225947 is an apocalyptic number.

66225947 is a deficient number, since it is larger than the sum of its proper divisors (4565893).

66225947 is a wasteful number, since it uses less digits than its factorization.

66225947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70293.

The product of its digits is 181440, while the sum is 41.

The square root of 66225947 is about 8137.9325998683. The cubic root of 66225947 is about 404.5846414806.

The spelling of 66225947 in words is "sixty-six million, two hundred twenty-five thousand, nine hundred forty-seven".