66475147 has 4 divisors (see below), whose sum is σ = 66505320. Its totient is φ = 66444976.

The previous prime is 66475127. The next prime is 66475159. The reversal of 66475147 is 74157466.

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

It is a cyclic number.

It is not a de Polignac number, because 66475147 - 2¹⁵ = 66442379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66475127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11497 + ... + 16282.

It is an arithmetic number, because the mean of its divisors is an integer number (16626330).

Almost surely, 2^66475147 is an apocalyptic number.

66475147 is a deficient number, since it is larger than the sum of its proper divisors (30173).

66475147 is a wasteful number, since it uses less digits than its factorization.

66475147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30172.

The product of its digits is 141120, while the sum is 40.

The square root of 66475147 is about 8153.2292375475. The cubic root of 66475147 is about 405.0914735210.

The spelling of 66475147 in words is "sixty-six million, four hundred seventy-five thousand, one hundred forty-seven".