66025512 has 96 divisors (see below), whose sum is σ = 205545600. Its totient is φ = 18755712.

The previous prime is 66025469. The next prime is 66025517. The reversal of 66025512 is 21552066.

66025512 is a `hidden beast` number, since 6 + 602 + 5 + 51 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (66025517) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 135333 + ... + 135819.

It is an arithmetic number, because the mean of its divisors is an integer number (2141100).

Almost surely, 2^66025512 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 66025512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102772800).

66025512 is an abundant number, since it is smaller than the sum of its proper divisors (139520088).

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

66025512 is a wasteful number, since it uses less digits than its factorization.

66025512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 775 (or 768 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 66025512 is about 8125.6084079901. The cubic root of 66025512 is about 404.1760661198.

Adding to 66025512 its reverse (21552066), we get a palindrome (87577578).

The spelling of 66025512 in words is "sixty-six million, twenty-five thousand, five hundred twelve".