7065881 has 2 divisors, whose sum is σ = 7065882. Its totient is φ = 7065880.

The previous prime is 7065871. The next prime is 7065911. The reversal of 7065881 is 1885607.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3610000 + 3455881 = 1900^2 + 1859^2 .

It is an emirp because it is prime and its reverse (1885607) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7065881 is a prime.

It is a super-2 number, since 2×7065881² = 99853348612322, which contains 22 as substring.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (7065811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3532940 + 3532941.

It is an arithmetic number, because the mean of its divisors is an integer number (3532941).

Almost surely, 2^7065881 is an apocalyptic number.

It is an amenable number.

7065881 is a deficient number, since it is larger than the sum of its proper divisors (1).

7065881 is an equidigital number, since it uses as much as digits as its factorization.

7065881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13440, while the sum is 35.

The square root of 7065881 is about 2658.1724925219. The cubic root of 7065881 is about 191.8913683087.

The spelling of 7065881 in words is "seven million, sixty-five thousand, eight hundred eighty-one".