1664360408 has 32 divisors (see below), whose sum is σ = 3332102400. Its totient is φ = 777483168.

The previous prime is 1664360407. The next prime is 1664360413. The reversal of 1664360408 is 8040634661.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664360407) 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, 97268 + ... + 113091.

It is an arithmetic number, because the mean of its divisors is an integer number (104128200).

Almost surely, 2^1664360408 is an apocalyptic number.

It is an amenable number.

1664360408 is an abundant number, since it is smaller than the sum of its proper divisors (1667741992).

1664360408 is a wasteful number, since it uses less digits than its factorization.

1664360408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210431 (or 210427 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 38.

The square root of 1664360408 is about 40796.5734835660. The cubic root of 1664360408 is about 1185.0839746552.

The spelling of 1664360408 in words is "one billion, six hundred sixty-four million, three hundred sixty thousand, four hundred eight".