66476671 has 4 divisors (see below), whose sum is σ = 68769000. Its totient is φ = 64184344.

The previous prime is 66476653. The next prime is 66476677. The reversal of 66476671 is 17667466.

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 66476671 - 2⁹ = 66476159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66476677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1146121 + ... + 1146178.

It is an arithmetic number, because the mean of its divisors is an integer number (17192250).

Almost surely, 2^66476671 is an apocalyptic number.

66476671 is a deficient number, since it is larger than the sum of its proper divisors (2292329).

66476671 is a wasteful number, since it uses less digits than its factorization.

66476671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2292328.

The product of its digits is 254016, while the sum is 43.

The square root of 66476671 is about 8153.3226969132. The cubic root of 66476671 is about 405.0945691876.

The spelling of 66476671 in words is "sixty-six million, four hundred seventy-six thousand, six hundred seventy-one".