1664297116 has 12 divisors (see below), whose sum is σ = 2918896288. Its totient is φ = 830326752.

The previous prime is 1664297081. The next prime is 1664297123. The reversal of 1664297116 is 6117924661.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 453396 + ... + 457051.

Almost surely, 2^1664297116 is an apocalyptic number.

It is an amenable number.

1664297116 is a deficient number, since it is larger than the sum of its proper divisors (1254599172).

1664297116 is a wasteful number, since it uses less digits than its factorization.

1664297116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 910908 (or 910906 counting only the distinct ones).

The product of its digits is 108864, while the sum is 43.

The square root of 1664297116 is about 40795.7977737904. The cubic root of 1664297116 is about 1185.0689524109.

The spelling of 1664297116 in words is "one billion, six hundred sixty-four million, two hundred ninety-seven thousand, one hundred sixteen".