1664202044 has 6 divisors (see below), whose sum is σ = 2912353584. Its totient is φ = 832101020.

The previous prime is 1664202017. The next prime is 1664202049. The reversal of 1664202044 is 4402024661.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1664201998 and 1664202016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664202049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 208025252 + ... + 208025259.

It is an arithmetic number, because the mean of its divisors is an integer number (485392264).

Almost surely, 2^1664202044 is an apocalyptic number.

It is an amenable number.

1664202044 is a deficient number, since it is larger than the sum of its proper divisors (1248151540).

1664202044 is a wasteful number, since it uses less digits than its factorization.

1664202044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416050515 (or 416050513 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 1664202044 is about 40794.6325390976. The cubic root of 1664202044 is about 1185.0463865241.

The spelling of 1664202044 in words is "one billion, six hundred sixty-four million, two hundred two thousand, forty-four".