71667587 has 2 divisors, whose sum is σ = 71667588. Its totient is φ = 71667586.

The previous prime is 71667571. The next prime is 71667623. The reversal of 71667587 is 78576617.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71667587 - 2⁴ = 71667571 is a prime.

It is not a weakly prime, because it can be changed into another prime (71661587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35833793 + 35833794.

It is an arithmetic number, because the mean of its divisors is an integer number (35833794).

Almost surely, 2^71667587 is an apocalyptic number.

71667587 is a deficient number, since it is larger than the sum of its proper divisors (1).

71667587 is an equidigital number, since it uses as much as digits as its factorization.

71667587 is an evil number, because the sum of its binary digits is even.

The product of its digits is 493920, while the sum is 47.

The square root of 71667587 is about 8465.6710897601. The cubic root of 71667587 is about 415.3755481815.

The spelling of 71667587 in words is "seventy-one million, six hundred sixty-seven thousand, five hundred eighty-seven".