71866351 has 2 divisors, whose sum is σ = 71866352. Its totient is φ = 71866350.

The previous prime is 71866331. The next prime is 71866369. The reversal of 71866351 is 15366817.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71866351 - 2¹⁵ = 71833583 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71866351.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71866331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35933175 + 35933176.

It is an arithmetic number, because the mean of its divisors is an integer number (35933176).

Almost surely, 2^71866351 is an apocalyptic number.

71866351 is a deficient number, since it is larger than the sum of its proper divisors (1).

71866351 is an equidigital number, since it uses as much as digits as its factorization.

71866351 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 37.

The square root of 71866351 is about 8477.4023733689. The cubic root of 71866351 is about 415.7591967285.

The spelling of 71866351 in words is "seventy-one million, eight hundred sixty-six thousand, three hundred fifty-one".