71866063 has 4 divisors (see below), whose sum is σ = 72775840. Its totient is φ = 70956288.

The previous prime is 71866061. The next prime is 71866111. The reversal of 71866063 is 36066817.

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 71866063 - 2¹ = 71866061 is a prime.

It is a super-2 number, since 2×71866063² = 10329462022239938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71866061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 454770 + ... + 454927.

It is an arithmetic number, because the mean of its divisors is an integer number (18193960).

Almost surely, 2^71866063 is an apocalyptic number.

71866063 is a deficient number, since it is larger than the sum of its proper divisors (909777).

71866063 is an equidigital number, since it uses as much as digits as its factorization.

71866063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909776.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 71866063 is about 8477.3853870164. The cubic root of 71866063 is about 415.7586413513.

The spelling of 71866063 in words is "seventy-one million, eight hundred sixty-six thousand, sixty-three".