601010661 has 4 divisors (see below), whose sum is σ = 801347552. Its totient is φ = 400673772.

The previous prime is 601010623. The next prime is 601010687. The reversal of 601010661 is 166010106.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 601010661 - 2¹¹ = 601008613 is a prime.

It is a super-2 number, since 2×601010661² = 722427629271313842, which contains 22 as substring.

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 (601010611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100168441 + ... + 100168446.

It is an arithmetic number, because the mean of its divisors is an integer number (200336888).

Almost surely, 2^601010661 is an apocalyptic number.

It is an amenable number.

601010661 is a deficient number, since it is larger than the sum of its proper divisors (200336891).

601010661 is a wasteful number, since it uses less digits than its factorization.

601010661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200336890.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 601010661 is about 24515.5187789286. The cubic root of 601010661 is about 843.9059688187.

Adding to 601010661 its reverse (166010106), we get a palindrome (767020767).

The spelling of 601010661 in words is "six hundred one million, ten thousand, six hundred sixty-one".