1660580797 has 2 divisors, whose sum is σ = 1660580798. Its totient is φ = 1660580796.

The previous prime is 1660580767. The next prime is 1660580849. The reversal of 1660580797 is 7970850661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1255001476 + 405579321 = 35426^2 + 20139^2 .

It is a cyclic number.

It is not a de Polignac number, because 1660580797 - 2¹¹ = 1660578749 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1660580797.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1660580717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 830290398 + 830290399.

It is an arithmetic number, because the mean of its divisors is an integer number (830290399).

Almost surely, 2^1660580797 is an apocalyptic number.

It is an amenable number.

1660580797 is a deficient number, since it is larger than the sum of its proper divisors (1).

1660580797 is an equidigital number, since it uses as much as digits as its factorization.

1660580797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 635040, while the sum is 49.

The square root of 1660580797 is about 40750.2245024491. The cubic root of 1660580797 is about 1184.1862221262.

The spelling of 1660580797 in words is "one billion, six hundred sixty million, five hundred eighty thousand, seven hundred ninety-seven".