1665066568 has 32 divisors (see below), whose sum is σ = 3448944000. Its totient is φ = 747264960.

The previous prime is 1665066527. The next prime is 1665066583. The reversal of 1665066568 is 8656605661.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112803 + ... + 126706.

It is an arithmetic number, because the mean of its divisors is an integer number (107779500).

Almost surely, 2^1665066568 is an apocalyptic number.

It is an amenable number.

1665066568 is an abundant number, since it is smaller than the sum of its proper divisors (1783877432).

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

1665066568 is a wasteful number, since it uses less digits than its factorization.

1665066568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239605 (or 239601 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 49.

The square root of 1665066568 is about 40805.2272141695. The cubic root of 1665066568 is about 1185.2515546594.

The spelling of 1665066568 in words is "one billion, six hundred sixty-five million, sixty-six thousand, five hundred sixty-eight".