16665657340 has 24 divisors (see below), whose sum is σ = 36839874960. Its totient is φ = 6315406848.

The previous prime is 16665657313. The next prime is 16665657367. The reversal of 16665657340 is 4375656661.

It is an interprime number because it is at equal distance from previous prime (16665657313) and next prime (16665657367).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21928117 + ... + 21928876.

It is an arithmetic number, because the mean of its divisors is an integer number (1534994790).

Almost surely, 2^16665657340 is an apocalyptic number.

16665657340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16665657340 is an abundant number, since it is smaller than the sum of its proper divisors (20174217620).

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

16665657340 is a wasteful number, since it uses less digits than its factorization.

16665657340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43857021 (or 43857019 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 49.

The spelling of 16665657340 in words is "sixteen billion, six hundred sixty-five million, six hundred fifty-seven thousand, three hundred forty".