1966906788 has 144 divisors (see below), whose sum is σ = 5964954240. Its totient is φ = 493194240.

The previous prime is 1966906769. The next prime is 1966906829. The reversal of 1966906788 is 8876096691.

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 47 ways as a sum of consecutive naturals, for example, 291420 + ... + 298092.

Almost surely, 2^1966906788 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1966906788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2982477120).

1966906788 is an abundant number, since it is smaller than the sum of its proper divisors (3998047452).

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

1966906788 is a wasteful number, since it uses less digits than its factorization.

1966906788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6738 (or 6725 counting only the distinct ones).

The product of its (nonzero) digits is 7838208, while the sum is 60.

The square root of 1966906788 is about 44349.8228632314. The cubic root of 1966906788 is about 1252.9332263361.

The spelling of 1966906788 in words is "one billion, nine hundred sixty-six million, nine hundred six thousand, seven hundred eighty-eight".