1660667668 has 12 divisors (see below), whose sum is σ = 3170365632. Its totient is φ = 754848920.

The previous prime is 1660667653. The next prime is 1660667681. The reversal of 1660667668 is 8667660661.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18871180 + ... + 18871267.

It is an arithmetic number, because the mean of its divisors is an integer number (264197136).

Almost surely, 2^1660667668 is an apocalyptic number.

It is an amenable number.

1660667668 is a deficient number, since it is larger than the sum of its proper divisors (1509697964).

1660667668 is a wasteful number, since it uses less digits than its factorization.

1660667668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37742462 (or 37742460 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 52.

The square root of 1660667668 is about 40751.2903844774. The cubic root of 1660667668 is about 1184.2068714572.

The spelling of 1660667668 in words is "one billion, six hundred sixty million, six hundred sixty-seven thousand, six hundred sixty-eight".