65881066 has 8 divisors (see below), whose sum is σ = 99781344. Its totient is φ = 32620620.

The previous prime is 65881051. The next prime is 65881097. The reversal of 65881066 is 66018856.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 159700 + ... + 160111.

It is an arithmetic number, because the mean of its divisors is an integer number (12472668).

Almost surely, 2^65881066 is an apocalyptic number.

65881066 is a deficient number, since it is larger than the sum of its proper divisors (33900278).

65881066 is a wasteful number, since it uses less digits than its factorization.

65881066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319916.

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 65881066 is about 8116.7152223051. The cubic root of 65881066 is about 403.8811082037.

The spelling of 65881066 in words is "sixty-five million, eight hundred eighty-one thousand, sixty-six".