1966890590694 has 96 divisors (see below), whose sum is σ = 4319886864384. Its totient is φ = 646743968640.

The previous prime is 1966890590677. The next prime is 1966890590699. The reversal of 1966890590694 is 4960950986691.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1966890590699) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 197335299 + ... + 197345265.

It is an arithmetic number, because the mean of its divisors is an integer number (44998821504).

Almost surely, 2^{1966890590694} is an apocalyptic number.

1966890590694 is an abundant number, since it is smaller than the sum of its proper divisors (2352996273690).

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

1966890590694 is a wasteful number, since it uses less digits than its factorization.

1966890590694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10642 (or 10639 counting only the distinct ones).

The product of its (nonzero) digits is 226748160, while the sum is 72.

The spelling of 1966890590694 in words is "one trillion, nine hundred sixty-six billion, eight hundred ninety million, five hundred ninety thousand, six hundred ninety-four".