601552661 has 2 divisors, whose sum is σ = 601552662. Its totient is φ = 601552660.

The previous prime is 601552657. The next prime is 601552681. The reversal of 601552661 is 166255106.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 364084561 + 237468100 = 19081^2 + 15410^2 .

It is a cyclic number.

It is not a de Polignac number, because 601552661 - 2² = 601552657 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (601552621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 300776330 + 300776331.

It is an arithmetic number, because the mean of its divisors is an integer number (300776331).

Almost surely, 2^601552661 is an apocalyptic number.

It is an amenable number.

601552661 is a deficient number, since it is larger than the sum of its proper divisors (1).

601552661 is an equidigital number, since it uses as much as digits as its factorization.

601552661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 601552661 is about 24526.5705103669. The cubic root of 601552661 is about 844.1595747516.

The spelling of 601552661 in words is "six hundred one million, five hundred fifty-two thousand, six hundred sixty-one".