65995920 has 120 divisors (see below), whose sum is σ = 224932032. Its totient is φ = 17337600.

The previous prime is 65995907. The next prime is 65995933. The reversal of 65995920 is 2959956.

65995920 is a `hidden beast` number, since 6 + 59 + 9 + 592 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (65995907) and next prime (65995933).

It is a tau number, because it is divible by the number of its divisors (120).

It is a super-2 number, since 2×65995920² = 8710922913292800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50475 + ... + 51765.

Almost surely, 2^65995920 is an apocalyptic number.

65995920 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65995920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112466016).

65995920 is an abundant number, since it is smaller than the sum of its proper divisors (158936112).

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

65995920 is a wasteful number, since it uses less digits than its factorization.

65995920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1381 (or 1372 counting only the distinct ones).

The product of its (nonzero) digits is 218700, while the sum is 45.

The square root of 65995920 is about 8123.7872941135. The cubic root of 65995920 is about 404.1156744869.

The spelling of 65995920 in words is "sixty-five million, nine hundred ninety-five thousand, nine hundred twenty".