66470789 has 16 divisors (see below), whose sum is σ = 85549056. Its totient is φ = 50122800.

The previous prime is 66470783. The next prime is 66470791. The reversal of 66470789 is 98707466.

It is a happy number.

It is not a de Polignac number, because 66470789 - 2²⁰ = 65422213 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66470783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11537 + ... + 16310.

It is an arithmetic number, because the mean of its divisors is an integer number (5346816).

Almost surely, 2^66470789 is an apocalyptic number.

It is an amenable number.

66470789 is a deficient number, since it is larger than the sum of its proper divisors (19078267).

66470789 is a wasteful number, since it uses less digits than its factorization.

66470789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27896.

The product of its (nonzero) digits is 508032, while the sum is 47.

The square root of 66470789 is about 8152.9619770976. The cubic root of 66470789 is about 405.0826209533.

The spelling of 66470789 in words is "sixty-six million, four hundred seventy thousand, seven hundred eighty-nine".