661063093 has 2 divisors, whose sum is σ = 661063094. Its totient is φ = 661063092.

The previous prime is 661063087. The next prime is 661063103. The reversal of 661063093 is 390360166.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 655001649 + 6061444 = 25593^2 + 2462^2 .

It is a cyclic number.

It is not a de Polignac number, because 661063093 - 2¹⁷ = 660932021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (661063043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330531546 + 330531547.

It is an arithmetic number, because the mean of its divisors is an integer number (330531547).

Almost surely, 2^661063093 is an apocalyptic number.

It is an amenable number.

661063093 is a deficient number, since it is larger than the sum of its proper divisors (1).

661063093 is an equidigital number, since it uses as much as digits as its factorization.

661063093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17496, while the sum is 34.

The square root of 661063093 is about 25711.1472517272. The cubic root of 661063093 is about 871.1259886743.

The spelling of 661063093 in words is "six hundred sixty-one million, sixty-three thousand, ninety-three".