66276725 has 12 divisors (see below), whose sum is σ = 83342880. Its totient is φ = 52273200.

The previous prime is 66276713. The next prime is 66276733. The reversal of 66276725 is 52767266.

It is a happy number.

It is not a de Polignac number, because 66276725 - 2⁴ = 66276709 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16895 + ... + 20444.

It is an arithmetic number, because the mean of its divisors is an integer number (6945240).

Almost surely, 2^66276725 is an apocalyptic number.

It is an amenable number.

66276725 is a deficient number, since it is larger than the sum of its proper divisors (17066155).

66276725 is a wasteful number, since it uses less digits than its factorization.

66276725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37420 (or 37415 counting only the distinct ones).

The product of its digits is 211680, while the sum is 41.

The square root of 66276725 is about 8141.0518362187. The cubic root of 66276725 is about 404.6880186385.

The spelling of 66276725 in words is "sixty-six million, two hundred seventy-six thousand, seven hundred twenty-five".