1906666720 has 96 divisors (see below), whose sum is σ = 5419008000. Its totient is φ = 619301376.

The previous prime is 1906666649. The next prime is 1906666733. The reversal of 1906666720 is 276666091.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23520 + ... + 66079.

It is an arithmetic number, because the mean of its divisors is an integer number (56448000).

Almost surely, 2^1906666720 is an apocalyptic number.

1906666720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1906666720 is an abundant number, since it is smaller than the sum of its proper divisors (3512341280).

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

1906666720 is a wasteful number, since it uses less digits than its factorization.

1906666720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89640 (or 89632 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 1906666720 is about 43665.3949942057. The cubic root of 1906666720 is about 1240.0092611171.

The spelling of 1906666720 in words is "one billion, nine hundred six million, six hundred sixty-six thousand, seven hundred twenty".