673150661 has 2 divisors, whose sum is σ = 673150662. Its totient is φ = 673150660.

The previous prime is 673150631. The next prime is 673150663. The reversal of 673150661 is 166051376.

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., 666930625 + 6220036 = 25825^2 + 2494^2 .

It is a cyclic number.

It is not a de Polignac number, because 673150661 - 2¹⁴ = 673134277 is a prime.

Together with 673150663, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (673150663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336575330 + 336575331.

It is an arithmetic number, because the mean of its divisors is an integer number (336575331).

Almost surely, 2^673150661 is an apocalyptic number.

It is an amenable number.

673150661 is a deficient number, since it is larger than the sum of its proper divisors (1).

673150661 is an equidigital number, since it uses as much as digits as its factorization.

673150661 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 673150661 is about 25945.1471570311. The cubic root of 673150661 is about 876.4034776134.

The spelling of 673150661 in words is "six hundred seventy-three million, one hundred fifty thousand, six hundred sixty-one".