905052661 has 2 divisors, whose sum is σ = 905052662. Its totient is φ = 905052660.

The previous prime is 905052653. The next prime is 905052679. The reversal of 905052661 is 166250509.

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., 840652036 + 64400625 = 28994^2 + 8025^2 .

It is a cyclic number.

It is not a de Polignac number, because 905052661 - 2³ = 905052653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (905052761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 452526330 + 452526331.

It is an arithmetic number, because the mean of its divisors is an integer number (452526331).

Almost surely, 2^905052661 is an apocalyptic number.

It is an amenable number.

905052661 is a deficient number, since it is larger than the sum of its proper divisors (1).

905052661 is an equidigital number, since it uses as much as digits as its factorization.

905052661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16200, while the sum is 34.

The square root of 905052661 is about 30084.0931556861. The cubic root of 905052661 is about 967.2927882753.

The spelling of 905052661 in words is "nine hundred five million, fifty-two thousand, six hundred sixty-one".