66672512 has 32 divisors (see below), whose sum is σ = 135017400. Its totient is φ = 32785920.

The previous prime is 66672511. The next prime is 66672527. The reversal of 66672512 is 21527666.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66672511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3539 + ... + 12077.

Almost surely, 2^66672512 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 66672512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67508700).

66672512 is an abundant number, since it is smaller than the sum of its proper divisors (68344888).

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

66672512 is an equidigital number, since it uses as much as digits as its factorization.

66672512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8614 (or 8602 counting only the distinct ones).

The product of its digits is 30240, while the sum is 35.

The square root of 66672512 is about 8165.3237535324. The cubic root of 66672512 is about 405.4919835246.

The spelling of 66672512 in words is "sixty-six million, six hundred seventy-two thousand, five hundred twelve".