66470765 has 8 divisors (see below), whose sum is σ = 84457080. Its totient is φ = 50048512.

The previous prime is 66470753. The next prime is 66470771. The reversal of 66470765 is 56707466.

It can be written as a sum of positive squares in 4 ways, for example, as 28697449 + 37773316 = 5357^2 + 6146^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66470765 - 2¹² = 66466669 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 390920 + ... + 391089.

It is an arithmetic number, because the mean of its divisors is an integer number (10557135).

Almost surely, 2^66470765 is an apocalyptic number.

It is an amenable number.

66470765 is a deficient number, since it is larger than the sum of its proper divisors (17986315).

66470765 is a wasteful number, since it uses less digits than its factorization.

66470765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 782031.

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

The square root of 66470765 is about 8152.9605052398. The cubic root of 66470765 is about 405.0825722001.

The spelling of 66470765 in words is "sixty-six million, four hundred seventy thousand, seven hundred sixty-five".