66450120 has 64 divisors (see below), whose sum is σ = 217477440. Its totient is φ = 16108800.

The previous prime is 66450101. The next prime is 66450149. The reversal of 66450120 is 2105466.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23851 + ... + 26490.

It is an arithmetic number, because the mean of its divisors is an integer number (3398085).

Almost surely, 2^66450120 is an apocalyptic number.

66450120 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66450120 is an abundant number, since it is smaller than the sum of its proper divisors (151027320).

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

66450120 is a wasteful number, since it uses less digits than its factorization.

66450120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50366 (or 50362 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 66450120 is about 8151.6943024135. The cubic root of 66450120 is about 405.0406299735.

Adding to 66450120 its reverse (2105466), we get a palindrome (68555586).

The spelling of 66450120 in words is "sixty-six million, four hundred fifty thousand, one hundred twenty".