66827967 has 8 divisors (see below), whose sum is σ = 89451696. Its totient is φ = 44378112.

The previous prime is 66827951. The next prime is 66827989. The reversal of 66827967 is 76972866.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66827967 - 2⁴ = 66827951 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66827767) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42568 + ... + 44109.

It is an arithmetic number, because the mean of its divisors is an integer number (11181462).

Almost surely, 2^66827967 is an apocalyptic number.

66827967 is a deficient number, since it is larger than the sum of its proper divisors (22623729).

66827967 is a wasteful number, since it uses less digits than its factorization.

66827967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86937.

The product of its digits is 1524096, while the sum is 51.

The square root of 66827967 is about 8174.8374295762. The cubic root of 66827967 is about 405.8068900528.

The spelling of 66827967 in words is "sixty-six million, eight hundred twenty-seven thousand, nine hundred sixty-seven".