66757425 has 24 divisors (see below), whose sum is σ = 126140736. Its totient is φ = 30517440.

The previous prime is 66757403. The next prime is 66757429. The reversal of 66757425 is 52475766.

It is not a de Polignac number, because 66757425 - 2⁷ = 66757297 is a prime.

66757425 is a modest number, since divided by 7425 gives 6675 as remainder.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66757429) 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, 63054 + ... + 64103.

It is an arithmetic number, because the mean of its divisors is an integer number (5255864).

Almost surely, 2^66757425 is an apocalyptic number.

It is an amenable number.

66757425 is a deficient number, since it is larger than the sum of its proper divisors (59383311).

66757425 is a wasteful number, since it uses less digits than its factorization.

66757425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127177 (or 127172 counting only the distinct ones).

The product of its digits is 352800, while the sum is 42.

The square root of 66757425 is about 8170.5217091689. The cubic root of 66757425 is about 405.6640531074.

The spelling of 66757425 in words is "sixty-six million, seven hundred fifty-seven thousand, four hundred twenty-five".