19666068 has 24 divisors (see below), whose sum is σ = 46296768. Its totient is φ = 6496896.

The previous prime is 19666067. The next prime is 19666079. The reversal of 19666068 is 86066691.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19666061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5896 + ... + 8607.

It is an arithmetic number, because the mean of its divisors is an integer number (1929032).

Almost surely, 2^19666068 is an apocalyptic number.

It is an amenable number.

19666068 is an abundant number, since it is smaller than the sum of its proper divisors (26630700).

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

19666068 is a wasteful number, since it uses less digits than its factorization.

19666068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14623 (or 14621 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 19666068 is about 4434.6440668897. The cubic root of 19666068 is about 269.9225566644.

The spelling of 19666068 in words is "nineteen million, six hundred sixty-six thousand, sixty-eight".