66696473 has 8 divisors (see below), whose sum is σ = 67223520. Its totient is φ = 66172000.

The previous prime is 66696451. The next prime is 66696493. The reversal of 66696473 is 37469666.

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 66696473 - 2¹⁰ = 66695449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66696493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116933 + ... + 117501.

It is an arithmetic number, because the mean of its divisors is an integer number (8402940).

Almost surely, 2^66696473 is an apocalyptic number.

It is an amenable number.

66696473 is a deficient number, since it is larger than the sum of its proper divisors (527047).

66696473 is a wasteful number, since it uses less digits than its factorization.

66696473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1287.

The product of its digits is 979776, while the sum is 47.

The square root of 66696473 is about 8166.7908630012. The cubic root of 66696473 is about 405.5405534146.

The spelling of 66696473 in words is "sixty-six million, six hundred ninety-six thousand, four hundred seventy-three".