66996120 has 64 divisors (see below), whose sum is σ = 202176000. Its totient is φ = 17760128.

The previous prime is 66996101. The next prime is 66996131. The reversal of 66996120 is 2169966.

It is a congruent number.

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, 19921 + ... + 23039.

It is an arithmetic number, because the mean of its divisors is an integer number (3159000).

Almost surely, 2^66996120 is an apocalyptic number.

66996120 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 66996120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101088000).

66996120 is an abundant number, since it is smaller than the sum of its proper divisors (135179880).

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

66996120 is a wasteful number, since it uses less digits than its factorization.

66996120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3312 (or 3308 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 39.

The square root of 66996120 is about 8185.1157597190. The cubic root of 66996120 is about 406.1469696909.

The spelling of 66996120 in words is "sixty-six million, nine hundred ninety-six thousand, one hundred twenty".