65605066 has 4 divisors (see below), whose sum is σ = 98407602. Its totient is φ = 32802532.

The previous prime is 65605037. The next prime is 65605069. The reversal of 65605066 is 66050656.

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., 63441225 + 2163841 = 7965^2 + 1471^2 .

It is not an unprimeable number, because it can be changed into a prime (65605069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16401265 + ... + 16401268.

Almost surely, 2^65605066 is an apocalyptic number.

65605066 is a deficient number, since it is larger than the sum of its proper divisors (32802536).

65605066 is a wasteful number, since it uses less digits than its factorization.

65605066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32802535.

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 65605066 is about 8099.6954263725. The cubic root of 65605066 is about 403.3163166253.

The spelling of 65605066 in words is "sixty-five million, six hundred five thousand, sixty-six".