66929625 has 64 divisors (see below), whose sum is σ = 141473280. Its totient is φ = 30585600.

The previous prime is 66929591. The next prime is 66929743. The reversal of 66929625 is 52692966.

It is not a de Polignac number, because 66929625 - 2¹⁰ = 66928601 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon 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 63 ways as a sum of consecutive naturals, for example, 22209 + ... + 25041.

It is an arithmetic number, because the mean of its divisors is an integer number (2210520).

Almost surely, 2^66929625 is an apocalyptic number.

It is an amenable number.

66929625 is an abundant number, since it is smaller than the sum of its proper divisors (74543655).

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

66929625 is a wasteful number, since it uses less digits than its factorization.

66929625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2864 (or 2848 counting only the distinct ones).

The product of its digits is 349920, while the sum is 45.

The square root of 66929625 is about 8181.0528051101. The cubic root of 66929625 is about 406.0125555259.

The spelling of 66929625 in words is "sixty-six million, nine hundred twenty-nine thousand, six hundred twenty-five".