66375120 has 80 divisors (see below), whose sum is σ = 235163520. Its totient is φ = 15171072.

The previous prime is 66375119. The next prime is 66375121. The reversal of 66375120 is 2157366.

It is an interprime number because it is at equal distance from previous prime (66375119) and next prime (66375121).

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 (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66375121) 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, 18075 + ... + 21434.

It is an arithmetic number, because the mean of its divisors is an integer number (2939544).

Almost surely, 2^66375120 is an apocalyptic number.

66375120 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66375120 is an abundant number, since it is smaller than the sum of its proper divisors (168788400).

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

66375120 is a wasteful number, since it uses less digits than its factorization.

66375120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39532 (or 39526 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 66375120 is about 8147.0927329938. The cubic root of 66375120 is about 404.8881873930. Note that the first 3 decimals are identical.

The spelling of 66375120 in words is "sixty-six million, three hundred seventy-five thousand, one hundred twenty".