66700525 has 12 divisors (see below), whose sum is σ = 84633472. Its totient is φ = 52118640.

The previous prime is 66700523. The next prime is 66700541. The reversal of 66700525 is 52500766.

It is not a de Polignac number, because 66700525 - 2¹ = 66700523 is a prime.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66700523) by changing a digit.

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, 29949 + ... + 32098.

Almost surely, 2^66700525 is an apocalyptic number.

It is an amenable number.

66700525 is a deficient number, since it is larger than the sum of its proper divisors (17932947).

66700525 is a wasteful number, since it uses less digits than its factorization.

66700525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62100 (or 62095 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 66700525 is about 8167.0389370934. The cubic root of 66700525 is about 405.5487658281.

The spelling of 66700525 in words is "sixty-six million, seven hundred thousand, five hundred twenty-five".