65975920 has 20 divisors (see below), whose sum is σ = 153394200. Its totient is φ = 26390336.

The previous prime is 65975909. The next prime is 65975939. The reversal of 65975920 is 2957956.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 412270 + ... + 412429.

It is an arithmetic number, because the mean of its divisors is an integer number (7669710).

Almost surely, 2^65975920 is an apocalyptic number.

It is an amenable number.

65975920 is an abundant number, since it is smaller than the sum of its proper divisors (87418280).

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

65975920 is a wasteful number, since it uses less digits than its factorization.

65975920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824712 (or 824706 counting only the distinct ones).

The product of its (nonzero) digits is 170100, while the sum is 43.

The square root of 65975920 is about 8122.5562478816. The cubic root of 65975920 is about 404.0748480739.

The spelling of 65975920 in words is "sixty-five million, nine hundred seventy-five thousand, nine hundred twenty".