1668302506 has 16 divisors (see below), whose sum is σ = 2752291584. Its totient is φ = 753602544.

The previous prime is 1668302483. The next prime is 1668302513. The reversal of 1668302506 is 6052038661.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 681390 + ... + 683833.

It is an arithmetic number, because the mean of its divisors is an integer number (172018224).

Almost surely, 2^1668302506 is an apocalyptic number.

1668302506 is a deficient number, since it is larger than the sum of its proper divisors (1083989078).

1668302506 is a wasteful number, since it uses less digits than its factorization.

1668302506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1365285.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 1668302506 is about 40844.8589910652. The cubic root of 1668302506 is about 1186.0188750554.

The spelling of 1668302506 in words is "one billion, six hundred sixty-eight million, three hundred two thousand, five hundred six".