66000671 has 4 divisors (see below), whose sum is σ = 72000744. Its totient is φ = 60000600.

The previous prime is 66000659. The next prime is 66000673. The reversal of 66000671 is 17600066.

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

It is a de Polignac number, because none of the positive numbers 2^k-66000671 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 66000671.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66000673) 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, 3000020 + ... + 3000041.

It is an arithmetic number, because the mean of its divisors is an integer number (18000186).

Almost surely, 2^66000671 is an apocalyptic number.

66000671 is a deficient number, since it is larger than the sum of its proper divisors (6000073).

66000671 is a wasteful number, since it uses less digits than its factorization.

66000671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6000072.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 66000671 is about 8124.0797017262. The cubic root of 66000671 is about 404.1253715889.

The spelling of 66000671 in words is "sixty-six million, six hundred seventy-one", and thus it is an aban number.