1660253633 has 2 divisors, whose sum is σ = 1660253634. Its totient is φ = 1660253632.

The previous prime is 1660253599. The next prime is 1660253657. The reversal of 1660253633 is 3363520661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1218917569 + 441336064 = 34913^2 + 21008^2 .

It is an emirp because it is prime and its reverse (3363520661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1660253633 - 2²⁰ = 1659205057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1660253593 and 1660253602.

It is not a weakly prime, because it can be changed into another prime (1660253663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 830126816 + 830126817.

It is an arithmetic number, because the mean of its divisors is an integer number (830126817).

Almost surely, 2^1660253633 is an apocalyptic number.

It is an amenable number.

1660253633 is a deficient number, since it is larger than the sum of its proper divisors (1).

1660253633 is an equidigital number, since it uses as much as digits as its factorization.

1660253633 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58320, while the sum is 35.

The square root of 1660253633 is about 40746.2100446164. The cubic root of 1660253633 is about 1184.1084484244.

The spelling of 1660253633 in words is "one billion, six hundred sixty million, two hundred fifty-three thousand, six hundred thirty-three".