661422341 has 2 divisors, whose sum is σ = 661422342. Its totient is φ = 661422340.

The previous prime is 661422301. The next prime is 661422353. The reversal of 661422341 is 143224166.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 639837025 + 21585316 = 25295^2 + 4646^2 .

It is a cyclic number.

It is not a de Polignac number, because 661422341 - 2¹⁰ = 661421317 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (661422301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330711170 + 330711171.

It is an arithmetic number, because the mean of its divisors is an integer number (330711171).

Almost surely, 2^661422341 is an apocalyptic number.

It is an amenable number.

661422341 is a deficient number, since it is larger than the sum of its proper divisors (1).

661422341 is an equidigital number, since it uses as much as digits as its factorization.

661422341 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 29.

The square root of 661422341 is about 25718.1325332925. The cubic root of 661422341 is about 871.2837616109.

The spelling of 661422341 in words is "six hundred sixty-one million, four hundred twenty-two thousand, three hundred forty-one".