1660520753 has 2 divisors, whose sum is σ = 1660520754. Its totient is φ = 1660520752.

The previous prime is 1660520737. The next prime is 1660520791. The reversal of 1660520753 is 3570250661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1644464704 + 16056049 = 40552^2 + 4007^2 .

It is an emirp because it is prime and its reverse (3570250661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1660520753 - 2⁴ = 1660520737 is a prime.

It is a super-3 number, since 3×1660520753³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (1660520153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 830260376 + 830260377.

It is an arithmetic number, because the mean of its divisors is an integer number (830260377).

Almost surely, 2^1660520753 is an apocalyptic number.

It is an amenable number.

1660520753 is a deficient number, since it is larger than the sum of its proper divisors (1).

1660520753 is an equidigital number, since it uses as much as digits as its factorization.

1660520753 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37800, while the sum is 35.

The square root of 1660520753 is about 40749.4877636517. The cubic root of 1660520753 is about 1184.1719491813.

The spelling of 1660520753 in words is "one billion, six hundred sixty million, five hundred twenty thousand, seven hundred fifty-three".