66704473 has 8 divisors (see below), whose sum is σ = 73172736. Its totient is φ = 60303600.

The previous prime is 66704471. The next prime is 66704483. The reversal of 66704473 is 37440766.

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 66704473 - 2¹ = 66704471 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66704471) 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, 14761 + ... + 18742.

It is an arithmetic number, because the mean of its divisors is an integer number (9146592).

Almost surely, 2^66704473 is an apocalyptic number.

It is an amenable number.

66704473 is a deficient number, since it is larger than the sum of its proper divisors (6468263).

66704473 is a wasteful number, since it uses less digits than its factorization.

66704473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33695.

The product of its (nonzero) digits is 84672, while the sum is 37.

The square root of 66704473 is about 8167.2806367848. The cubic root of 66704473 is about 405.5567671391.

The spelling of 66704473 in words is "sixty-six million, seven hundred four thousand, four hundred seventy-three".