2661603908 has 6 divisors (see below), whose sum is σ = 4657806846. Its totient is φ = 1330801952.

The previous prime is 2661603883. The next prime is 2661603913. The reversal of 2661603908 is 8093061662.

It can be written as a sum of positive squares in only one way, i.e., 2454013444 + 207590464 = 49538^2 + 14408^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332700485 + ... + 332700492.

It is an arithmetic number, because the mean of its divisors is an integer number (776301141).

Almost surely, 2^2661603908 is an apocalyptic number.

It is an amenable number.

2661603908 is a deficient number, since it is larger than the sum of its proper divisors (1996202938).

2661603908 is a wasteful number, since it uses less digits than its factorization.

2661603908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665400981 (or 665400979 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 2661603908 is about 51590.7347107986. The cubic root of 2661603908 is about 1385.8444125424.

The spelling of 2661603908 in words is "two billion, six hundred sixty-one million, six hundred three thousand, nine hundred eight".