616661306 has 4 divisors (see below), whose sum is σ = 924991962. Its totient is φ = 308330652.

The previous prime is 616661239. The next prime is 616661317. The reversal of 616661306 is 603166616.

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., 389707081 + 226954225 = 19741^2 + 15065^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 154165325 + ... + 154165328.

Almost surely, 2^616661306 is an apocalyptic number.

616661306 is a deficient number, since it is larger than the sum of its proper divisors (308330656).

616661306 is a wasteful number, since it uses less digits than its factorization.

616661306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308330655.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 616661306 is about 24832.6661073675. Note that the first 3 decimals coincide. The cubic root of 616661306 is about 851.1685455054.

The spelling of 616661306 in words is "six hundred sixteen million, six hundred sixty-one thousand, three hundred six".