66049604 has 6 divisors (see below), whose sum is σ = 115586814. Its totient is φ = 33024800.

The previous prime is 66049601. The next prime is 66049619. The reversal of 66049604 is 40694066.

It can be written as a sum of positive squares in only one way, i.e., 60996100 + 5053504 = 7810^2 + 2248^2 .

It is not an unprimeable number, because it can be changed into a prime (66049601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8256197 + ... + 8256204.

It is an arithmetic number, because the mean of its divisors is an integer number (19264469).

Almost surely, 2^66049604 is an apocalyptic number.

It is an amenable number.

66049604 is a deficient number, since it is larger than the sum of its proper divisors (49537210).

66049604 is a wasteful number, since it uses less digits than its factorization.

66049604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16512405 (or 16512403 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 66049604 is about 8127.0907463864. The cubic root of 66049604 is about 404.2252199765.

The spelling of 66049604 in words is "sixty-six million, forty-nine thousand, six hundred four".