65506646 has 4 divisors (see below), whose sum is σ = 98259972. Its totient is φ = 32753322.

The previous prime is 65506601. The next prime is 65506657. The reversal of 65506646 is 64660556.

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

It is a super-2 number, since 2×65506646² = 8582241340338632, which contains 22 as substring.

It is a Curzon 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, 16376660 + ... + 16376663.

It is an arithmetic number, because the mean of its divisors is an integer number (24564993).

Almost surely, 2^65506646 is an apocalyptic number.

65506646 is a deficient number, since it is larger than the sum of its proper divisors (32753326).

65506646 is a wasteful number, since it uses less digits than its factorization.

65506646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32753325.

The product of its (nonzero) digits is 129600, while the sum is 38.

The square root of 65506646 is about 8093.6176089558. The cubic root of 65506646 is about 403.1145321161.

The spelling of 65506646 in words is "sixty-five million, five hundred six thousand, six hundred forty-six".