660957383 has 2 divisors, whose sum is σ = 660957384. Its totient is φ = 660957382.

The previous prime is 660957359. The next prime is 660957419. The reversal of 660957383 is 383759066.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 660957383 - 2¹⁴ = 660940999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (660950383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330478691 + 330478692.

It is an arithmetic number, because the mean of its divisors is an integer number (330478692).

Almost surely, 2^660957383 is an apocalyptic number.

660957383 is a deficient number, since it is larger than the sum of its proper divisors (1).

660957383 is an equidigital number, since it uses as much as digits as its factorization.

660957383 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 816480, while the sum is 47.

The square root of 660957383 is about 25709.0914464125. The cubic root of 660957383 is about 871.0795525432.

The spelling of 660957383 in words is "six hundred sixty million, nine hundred fifty-seven thousand, three hundred eighty-three".