66304456 has 8 divisors (see below), whose sum is σ = 124320870. Its totient is φ = 33152224.

The previous prime is 66304439. The next prime is 66304457. The reversal of 66304456 is 65440366.

It can be written as a sum of positive squares in only one way, i.e., 57244356 + 9060100 = 7566^2 + 3010^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (66304457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4144021 + ... + 4144036.

Almost surely, 2^66304456 is an apocalyptic number.

It is an amenable number.

66304456 is a deficient number, since it is larger than the sum of its proper divisors (58016414).

66304456 is a wasteful number, since it uses less digits than its factorization.

66304456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8288063 (or 8288059 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 34.

The square root of 66304456 is about 8142.7548163997. The cubic root of 66304456 is about 404.7444529227.

The spelling of 66304456 in words is "sixty-six million, three hundred four thousand, four hundred fifty-six".