661037327 has 2 divisors, whose sum is σ = 661037328. Its totient is φ = 661037326.

The previous prime is 661037317. The next prime is 661037329. The reversal of 661037327 is 723730166.

It is a happy number.

661037327 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 661037327 - 2⁸ = 661037071 is a prime.

Together with 661037329, 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 (661037329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330518663 + 330518664.

It is an arithmetic number, because the mean of its divisors is an integer number (330518664).

Almost surely, 2^661037327 is an apocalyptic number.

661037327 is a deficient number, since it is larger than the sum of its proper divisors (1).

661037327 is an equidigital number, since it uses as much as digits as its factorization.

661037327 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31752, while the sum is 35.

The square root of 661037327 is about 25710.6461801332. The cubic root of 661037327 is about 871.1146706805.

The spelling of 661037327 in words is "six hundred sixty-one million, thirty-seven thousand, three hundred twenty-seven".