1681419966 has 16 divisors (see below), whose sum is σ = 3373797504. Its totient is φ = 558647064.

The previous prime is 1681419959. The next prime is 1681419967. The reversal of 1681419966 is 6699141861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1681419967) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 454570 + ... + 458253.

It is an arithmetic number, because the mean of its divisors is an integer number (210862344).

Almost surely, 2^1681419966 is an apocalyptic number.

1681419966 is an abundant number, since it is smaller than the sum of its proper divisors (1692377538).

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

1681419966 is a wasteful number, since it uses less digits than its factorization.

1681419966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 913135.

The product of its digits is 559872, while the sum is 51.

The square root of 1681419966 is about 41005.1212167456. The cubic root of 1681419966 is about 1189.1192234998.

The spelling of 1681419966 in words is "one billion, six hundred eighty-one million, four hundred nineteen thousand, nine hundred sixty-six".