1696994666640 has 2400 divisors, whose sum is σ = 7772749940736. Its totient is φ = 335385722880.

The previous prime is 1696994666597. The next prime is 1696994666753. The reversal of 1696994666640 is 466664996961.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

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 479 ways as a sum of consecutive naturals, for example, 8792718384 + ... + 8792718576.

Almost surely, 2^{1696994666640} is an apocalyptic number.

1696994666640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1696994666640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3886374970368).

1696994666640 is an abundant number, since it is smaller than the sum of its proper divisors (6075755274096).

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

1696994666640 is a wasteful number, since it uses less digits than its factorization.

1696994666640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319 (or 291 counting only the distinct ones).

The product of its (nonzero) digits is 544195584, while the sum is 72.

The spelling of 1696994666640 in words is "one trillion, six hundred ninety-six billion, nine hundred ninety-four million, six hundred sixty-six thousand, six hundred forty".