1664890122 has 32 divisors (see below), whose sum is σ = 3857599872. Its totient is φ = 469165824.

The previous prime is 1664890081. The next prime is 1664890127. The reversal of 1664890122 is 2210984661.

It is not an unprimeable number, because it can be changed into a prime (1664890127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 268443 + ... + 274574.

It is an arithmetic number, because the mean of its divisors is an integer number (120549996).

Almost surely, 2^1664890122 is an apocalyptic number.

1664890122 is an abundant number, since it is smaller than the sum of its proper divisors (2192709750).

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

1664890122 is a wasteful number, since it uses less digits than its factorization.

1664890122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543102.

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 1664890122 is about 40803.0651054550. The cubic root of 1664890122 is about 1185.2096864067.

The spelling of 1664890122 in words is "one billion, six hundred sixty-four million, eight hundred ninety thousand, one hundred twenty-two".