71666067 has 16 divisors (see below), whose sum is σ = 110374272. Its totient is φ = 40878720.

The previous prime is 71666059. The next prime is 71666087. The reversal of 71666067 is 76066617.

It is not a de Polignac number, because 71666067 - 2³ = 71666059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71666087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63313 + ... + 64434.

It is an arithmetic number, because the mean of its divisors is an integer number (6898392).

Almost surely, 2^71666067 is an apocalyptic number.

71666067 is a deficient number, since it is larger than the sum of its proper divisors (38708205).

71666067 is a wasteful number, since it uses less digits than its factorization.

71666067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127778.

The product of its (nonzero) digits is 63504, while the sum is 39.

The square root of 71666067 is about 8465.5813149482. The cubic root of 71666067 is about 415.3726115899.

The spelling of 71666067 in words is "seventy-one million, six hundred sixty-six thousand, sixty-seven".