66446160 has 80 divisors (see below), whose sum is σ = 224717760. Its totient is φ = 16107520.

The previous prime is 66446143. The next prime is 66446167. The reversal of 66446160 is 6164466.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66446167) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9945 + ... + 15224.

It is an arithmetic number, because the mean of its divisors is an integer number (2808972).

Almost surely, 2^66446160 is an apocalyptic number.

66446160 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66446160 is an abundant number, since it is smaller than the sum of its proper divisors (158271600).

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

66446160 is a wasteful number, since it uses less digits than its factorization.

66446160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25196 (or 25190 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 66446160 is about 8151.4514045046. The cubic root of 66446160 is about 405.0325838744.

The spelling of 66446160 in words is "sixty-six million, four hundred forty-six thousand, one hundred sixty".