190665564 has 12 divisors (see below), whose sum is σ = 444886344. Its totient is φ = 63555184.

The previous prime is 190665529. The next prime is 190665577. The reversal of 190665564 is 465566091.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7944387 + ... + 7944410.

It is an arithmetic number, because the mean of its divisors is an integer number (37073862).

Almost surely, 2^190665564 is an apocalyptic number.

It is an amenable number.

190665564 is an abundant number, since it is smaller than the sum of its proper divisors (254220780).

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

190665564 is a wasteful number, since it uses less digits than its factorization.

190665564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15888804 (or 15888802 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 42.

The square root of 190665564 is about 13808.1701901447. The cubic root of 190665564 is about 575.5601990971.

The spelling of 190665564 in words is "one hundred ninety million, six hundred sixty-five thousand, five hundred sixty-four".