1668738308 has 24 divisors (see below), whose sum is σ = 3173157120. Its totient is φ = 764955360.

The previous prime is 1668738307. The next prime is 1668738349. The reversal of 1668738308 is 8038378661.

It is not an unprimeable number, because it can be changed into a prime (1668738301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 351791 + ... + 356502.

It is an arithmetic number, because the mean of its divisors is an integer number (132214880).

Almost surely, 2^1668738308 is an apocalyptic number.

It is an amenable number.

1668738308 is a deficient number, since it is larger than the sum of its proper divisors (1504418812).

1668738308 is a wasteful number, since it uses less digits than its factorization.

1668738308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708347 (or 708345 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 50.

The square root of 1668738308 is about 40850.1934879139. The cubic root of 1668738308 is about 1186.1221385815.

The spelling of 1668738308 in words is "one billion, six hundred sixty-eight million, seven hundred thirty-eight thousand, three hundred eight".