71085766 has 4 divisors (see below), whose sum is σ = 106628652. Its totient is φ = 35542882.

The previous prime is 71085691. The next prime is 71085793. The reversal of 71085766 is 66758017.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×71085766² = 10106372255613512, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) 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 an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17771440 + ... + 17771443.

It is an arithmetic number, because the mean of its divisors is an integer number (26657163).

Almost surely, 2^71085766 is an apocalyptic number.

71085766 is a deficient number, since it is larger than the sum of its proper divisors (35542886).

71085766 is a wasteful number, since it uses less digits than its factorization.

71085766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35542885.

The product of its (nonzero) digits is 70560, while the sum is 40.

The square root of 71085766 is about 8431.2375129633. The cubic root of 71085766 is about 414.2484408910.

The spelling of 71085766 in words is "seventy-one million, eighty-five thousand, seven hundred sixty-six".