601603661 has 8 divisors (see below), whose sum is σ = 610795584. Its totient is φ = 592431840.

The previous prime is 601603657. The next prime is 601603679. The reversal of 601603661 is 166306106.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 601603661 - 2² = 601603657 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (601603601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62006 + ... + 71048.

It is an arithmetic number, because the mean of its divisors is an integer number (76349448).

Almost surely, 2^601603661 is an apocalyptic number.

It is an amenable number.

601603661 is a deficient number, since it is larger than the sum of its proper divisors (9191923).

601603661 is an equidigital number, since it uses as much as digits as its factorization.

601603661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10051.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 601603661 is about 24527.6101771045. The cubic root of 601603661 is about 844.1834301980.

Adding to 601603661 its reverse (166306106), we get a palindrome (767909767).

The spelling of 601603661 in words is "six hundred one million, six hundred three thousand, six hundred sixty-one".