664141566 has 16 divisors (see below), whose sum is σ = 1449036288. Its totient is φ = 201255000.

The previous prime is 664141549. The next prime is 664141591. The reversal of 664141566 is 665141466.

It is a happy number.

It is a congruent number.

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, 5031310 + ... + 5031441.

It is an arithmetic number, because the mean of its divisors is an integer number (90564768).

Almost surely, 2^664141566 is an apocalyptic number.

664141566 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

664141566 is an abundant number, since it is smaller than the sum of its proper divisors (784894722).

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

664141566 is a wasteful number, since it uses less digits than its factorization.

664141566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10062767.

The product of its digits is 103680, while the sum is 39.

The square root of 664141566 is about 25770.9442201872. The cubic root of 664141566 is about 872.4761299753.

The spelling of 664141566 in words is "six hundred sixty-four million, one hundred forty-one thousand, five hundred sixty-six".