66027671 has 4 divisors (see below), whose sum is σ = 67638144. Its totient is φ = 64417200.

The previous prime is 66027649. The next prime is 66027673. The reversal of 66027671 is 17672066.

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 66027671 - 2⁶ = 66027607 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 (66027673) 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, 805175 + ... + 805256.

It is an arithmetic number, because the mean of its divisors is an integer number (16909536).

Almost surely, 2^66027671 is an apocalyptic number.

66027671 is a deficient number, since it is larger than the sum of its proper divisors (1610473).

66027671 is a wasteful number, since it uses less digits than its factorization.

66027671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1610472.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 66027671 is about 8125.7412584945. The cubic root of 66027671 is about 404.1804715210.

The spelling of 66027671 in words is "sixty-six million, twenty-seven thousand, six hundred seventy-one".