1001664133 has 2 divisors, whose sum is σ = 1001664134. Its totient is φ = 1001664132.

The previous prime is 1001664127. The next prime is 1001664143. The reversal of 1001664133 is 3314661001.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 780755364 + 220908769 = 27942^2 + 14863^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001664133 - 2¹⁷ = 1001533061 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1001664098 and 1001664107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001664143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500832066 + 500832067.

It is an arithmetic number, because the mean of its divisors is an integer number (500832067).

Almost surely, 2^1001664133 is an apocalyptic number.

It is an amenable number.

1001664133 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001664133 is an equidigital number, since it uses as much as digits as its factorization.

1001664133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 1001664133 is about 31649.0779170579. The cubic root of 1001664133 is about 1000.5544035799.

The spelling of 1001664133 in words is "one billion, one million, six hundred sixty-four thousand, one hundred thirty-three".