1664140146 has 16 divisors (see below), whose sum is σ = 3382843008. Its totient is φ = 545619600.

The previous prime is 1664140141. The next prime is 1664140201. The reversal of 1664140146 is 6410414661.

It is not an unprimeable number, because it can be changed into a prime (1664140141) 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, 2273050 + ... + 2273781.

It is an arithmetic number, because the mean of its divisors is an integer number (211427688).

Almost surely, 2^1664140146 is an apocalyptic number.

1664140146 is an abundant number, since it is smaller than the sum of its proper divisors (1718702862).

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

1664140146 is a wasteful number, since it uses less digits than its factorization.

1664140146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4546897.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 1664140146 is about 40793.8738783166. The cubic root of 1664140146 is about 1185.0316942154.

The spelling of 1664140146 in words is "one billion, six hundred sixty-four million, one hundred forty thousand, one hundred forty-six".