65643948 has 18 divisors (see below), whose sum is σ = 165933404. Its totient is φ = 21881304.

The previous prime is 65643947. The next prime is 65643983. The reversal of 65643948 is 84934656.

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (65643943) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 911686 + ... + 911757.

Almost surely, 2^65643948 is an apocalyptic number.

It is an amenable number.

65643948 is an abundant number, since it is smaller than the sum of its proper divisors (100289456).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65643948 is a wasteful number, since it uses less digits than its factorization.

65643948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1823453 (or 1823448 counting only the distinct ones).

The product of its digits is 622080, while the sum is 45.

The square root of 65643948 is about 8102.0952845545. The cubic root of 65643948 is about 403.3959784003.

The spelling of 65643948 in words is "sixty-five million, six hundred forty-three thousand, nine hundred forty-eight".