66066471 has 12 divisors (see below), whose sum is σ = 101043072. Its totient is φ = 41453376.

The previous prime is 66066431. The next prime is 66066479. The reversal of 66066471 is 17466066.

66066471 is a `hidden beast` number, since 6 + 6 + 0 + 6 + 647 + 1 = 666.

It is not a de Polignac number, because 66066471 - 2¹¹ = 66064423 is a prime.

It is a super-3 number, since 3×66066471³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66066479) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 215751 + ... + 216056.

It is an arithmetic number, because the mean of its divisors is an integer number (8420256).

Almost surely, 2^66066471 is an apocalyptic number.

66066471 is a deficient number, since it is larger than the sum of its proper divisors (34976601).

66066471 is a wasteful number, since it uses less digits than its factorization.

66066471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431830 (or 431827 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 66066471 is about 8128.1283823522. The cubic root of 66066471 is about 404.2596258678.

The spelling of 66066471 in words is "sixty-six million, sixty-six thousand, four hundred seventy-one".