1666647930 has 32 divisors (see below), whose sum is σ = 4067755200. Its totient is φ = 436906112.

The previous prime is 1666647929. The next prime is 1666647959. The reversal of 1666647930 is 397466661.

It is a self number, because there is not a number n which added to its sum of digits gives 1666647930.

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 15 ways as a sum of consecutive naturals, for example, 469035 + ... + 472574.

It is an arithmetic number, because the mean of its divisors is an integer number (127117350).

Almost surely, 2^1666647930 is an apocalyptic number.

1666647930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1666647930 is an abundant number, since it is smaller than the sum of its proper divisors (2401107270).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1666647930 is a wasteful number, since it uses less digits than its factorization.

1666647930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 941678.

The product of its (nonzero) digits is 979776, while the sum is 48.

The square root of 1666647930 is about 40824.5995693773. The cubic root of 1666647930 is about 1185.6266585251.

The spelling of 1666647930 in words is "one billion, six hundred sixty-six million, six hundred forty-seven thousand, nine hundred thirty".