1664028106 has 16 divisors (see below), whose sum is σ = 2774757888. Its totient is φ = 743238000.

The previous prime is 1664028103. The next prime is 1664028209. The reversal of 1664028106 is 6018204661.

It is not an unprimeable number, because it can be changed into a prime (1664028101) 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, 1031470 + ... + 1033081.

It is an arithmetic number, because the mean of its divisors is an integer number (173422368).

Almost surely, 2^1664028106 is an apocalyptic number.

1664028106 is a deficient number, since it is larger than the sum of its proper divisors (1110729782).

1664028106 is a wasteful number, since it uses less digits than its factorization.

1664028106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2064597.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 1664028106 is about 40792.5006097935. The cubic root of 1664028106 is about 1185.0050991134.

The spelling of 1664028106 in words is "one billion, six hundred sixty-four million, twenty-eight thousand, one hundred six".