66704474 has 4 divisors (see below), whose sum is σ = 100056714. Its totient is φ = 33352236.

The previous prime is 66704471. The next prime is 66704483. The reversal of 66704474 is 47440766.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 66667225 + 37249 = 8165^2 + 193^2 .

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 as a sum of consecutive naturals, namely, 16676117 + ... + 16676120.

Almost surely, 2^66704474 is an apocalyptic number.

66704474 is a deficient number, since it is larger than the sum of its proper divisors (33352240).

66704474 is a wasteful number, since it uses less digits than its factorization.

66704474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33352239.

The product of its (nonzero) digits is 112896, while the sum is 38.

The square root of 66704474 is about 8167.2806980047. The cubic root of 66704474 is about 405.5567691658.

The spelling of 66704474 in words is "sixty-six million, seven hundred four thousand, four hundred seventy-four".