1664325053 has 2 divisors, whose sum is σ = 1664325054. Its totient is φ = 1664325052.

The previous prime is 1664325023. The next prime is 1664325071. The reversal of 1664325053 is 3505234661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 947531524 + 716793529 = 30782^2 + 26773^2 .

It is a cyclic number.

It is not a de Polignac number, because 1664325053 - 2⁶ = 1664324989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1664325023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 832162526 + 832162527.

It is an arithmetic number, because the mean of its divisors is an integer number (832162527).

Almost surely, 2^1664325053 is an apocalyptic number.

It is an amenable number.

1664325053 is a deficient number, since it is larger than the sum of its proper divisors (1).

1664325053 is an equidigital number, since it uses as much as digits as its factorization.

1664325053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 35.

The square root of 1664325053 is about 40796.1401728154. The cubic root of 1664325053 is about 1185.0755832554.

The spelling of 1664325053 in words is "one billion, six hundred sixty-four million, three hundred twenty-five thousand, fifty-three".