682497661 has 2 divisors, whose sum is σ = 682497662. Its totient is φ = 682497660.

The previous prime is 682497637. The next prime is 682497701. The reversal of 682497661 is 166794286.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 403407225 + 279090436 = 20085^2 + 16706^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-682497661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (682497611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 341248830 + 341248831.

It is an arithmetic number, because the mean of its divisors is an integer number (341248831).

Almost surely, 2^682497661 is an apocalyptic number.

It is an amenable number.

682497661 is a deficient number, since it is larger than the sum of its proper divisors (1).

682497661 is an equidigital number, since it uses as much as digits as its factorization.

682497661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 49.

The square root of 682497661 is about 26124.6561891252. The cubic root of 682497661 is about 880.4412650082.

The spelling of 682497661 in words is "six hundred eighty-two million, four hundred ninety-seven thousand, six hundred sixty-one".