675031661 has 2 divisors, whose sum is σ = 675031662. Its totient is φ = 675031660.

The previous prime is 675031607. The next prime is 675031703. The reversal of 675031661 is 166130576.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 555544900 + 119486761 = 23570^2 + 10931^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-675031661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (675030661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 337515830 + 337515831.

It is an arithmetic number, because the mean of its divisors is an integer number (337515831).

Almost surely, 2^675031661 is an apocalyptic number.

It is an amenable number.

675031661 is a deficient number, since it is larger than the sum of its proper divisors (1).

675031661 is an equidigital number, since it uses as much as digits as its factorization.

675031661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 675031661 is about 25981.3714226174. The cubic root of 675031661 is about 877.2190364088.

The spelling of 675031661 in words is "six hundred seventy-five million, thirty-one thousand, six hundred sixty-one".