1660133213 has 2 divisors, whose sum is σ = 1660133214. Its totient is φ = 1660133212.

The previous prime is 1660133191. The next prime is 1660133269. The reversal of 1660133213 is 3123310661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1410903844 + 249229369 = 37562^2 + 15787^2 .

It is a cyclic number.

It is not a de Polignac number, because 1660133213 - 2¹² = 1660129117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1660132213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 830066606 + 830066607.

It is an arithmetic number, because the mean of its divisors is an integer number (830066607).

Almost surely, 2^1660133213 is an apocalyptic number.

It is an amenable number.

1660133213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1660133213 is an equidigital number, since it uses as much as digits as its factorization.

1660133213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 1660133213 is about 40744.7323343767. The cubic root of 1660133213 is about 1184.0798195081.

Adding to 1660133213 its reverse (3123310661), we get a palindrome (4783443874).

The spelling of 1660133213 in words is "one billion, six hundred sixty million, one hundred thirty-three thousand, two hundred thirteen".