65312066 has 4 divisors (see below), whose sum is σ = 97968102. Its totient is φ = 32656032.

The previous prime is 65312053. The next prime is 65312077. The reversal of 65312066 is 66021356.

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

It can be written as a sum of positive squares in only one way, i.e., 48706441 + 16605625 = 6979^2 + 4075^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16328015 + ... + 16328018.

Almost surely, 2^65312066 is an apocalyptic number.

65312066 is a deficient number, since it is larger than the sum of its proper divisors (32656036).

65312066 is a wasteful number, since it uses less digits than its factorization.

65312066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32656035.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 65312066 is about 8081.5880865087. The cubic root of 65312066 is about 402.7150010629.

The spelling of 65312066 in words is "sixty-five million, three hundred twelve thousand, sixty-six".