66207152 has 40 divisors (see below), whose sum is σ = 141218640. Its totient is φ = 29818880.

The previous prime is 66207137. The next prime is 66207181. The reversal of 66207152 is 25170266.

It is a super-2 number, since 2×66207152² = 8766773951902208, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18224 + ... + 21552.

It is an arithmetic number, because the mean of its divisors is an integer number (3530466).

Almost surely, 2^66207152 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66207152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70609320).

66207152 is an abundant number, since it is smaller than the sum of its proper divisors (75011488).

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

66207152 is a wasteful number, since it uses less digits than its factorization.

66207152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3461 (or 3455 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 66207152 is about 8136.7777406047. Note that the first 4 decimals coincide. The cubic root of 66207152 is about 404.5463639970.

The spelling of 66207152 in words is "sixty-six million, two hundred seven thousand, one hundred fifty-two".