601015661 has 8 divisors (see below), whose sum is σ = 610395744. Its totient is φ = 591647760.

The previous prime is 601015627. The next prime is 601015673. The reversal of 601015661 is 166510106.

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 601015661 - 2¹⁰ = 601014637 is a prime.

It is a super-2 number, since 2×601015661² = 722439649534533842, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 601015661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (601015361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178766 + ... + 182096.

It is an arithmetic number, because the mean of its divisors is an integer number (76299468).

Almost surely, 2^601015661 is an apocalyptic number.

It is an amenable number.

601015661 is a deficient number, since it is larger than the sum of its proper divisors (9380083).

601015661 is a wasteful number, since it uses less digits than its factorization.

601015661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6091.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 601015661 is about 24515.6207549391. The cubic root of 601015661 is about 843.9083090534.

Adding to 601015661 its reverse (166510106), we get a palindrome (767525767).

The spelling of 601015661 in words is "six hundred one million, fifteen thousand, six hundred sixty-one".