1661060005 has 8 divisors (see below), whose sum is σ = 2174478624. Its totient is φ = 1208043600.

The previous prime is 1661059991. The next prime is 1661060017. The reversal of 1661060005 is 5000601661.

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

It is not a de Polignac number, because 1661060005 - 2²¹ = 1658962853 is a prime.

It is a super-3 number, since 3×1661060005³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15100491 + ... + 15100600.

It is an arithmetic number, because the mean of its divisors is an integer number (271809828).

Almost surely, 2^1661060005 is an apocalyptic number.

It is an amenable number.

1661060005 is a deficient number, since it is larger than the sum of its proper divisors (513418619).

1661060005 is a wasteful number, since it uses less digits than its factorization.

1661060005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30201107.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 1661060005 is about 40756.1038986800. The cubic root of 1661060005 is about 1184.3001214186.

Adding to 1661060005 its reverse (5000601661), we get a palindrome (6661661666).

The spelling of 1661060005 in words is "one billion, six hundred sixty-one million, sixty thousand, five".