65642812 has 6 divisors (see below), whose sum is σ = 114874928. Its totient is φ = 32821404.

The previous prime is 65642809. The next prime is 65642867. The reversal of 65642812 is 21824656.

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, 8205348 + ... + 8205355.

Almost surely, 2^65642812 is an apocalyptic number.

It is an amenable number.

65642812 is a deficient number, since it is larger than the sum of its proper divisors (49232116).

65642812 is a wasteful number, since it uses less digits than its factorization.

65642812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16410707 (or 16410705 counting only the distinct ones).

The product of its digits is 23040, while the sum is 34.

The square root of 65642812 is about 8102.0251789290. The cubic root of 65642812 is about 403.3936513999.

The spelling of 65642812 in words is "sixty-five million, six hundred forty-two thousand, eight hundred twelve".