660011005 has 8 divisors (see below), whose sum is σ = 796161024. Its totient is φ = 525243600.

The previous prime is 660010997. The next prime is 660011017. The reversal of 660011005 is 500110066.

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

It is not a de Polignac number, because 660011005 - 2³ = 660010997 is a prime.

It is a super-2 number, since 2×660011005² = 871229053442220050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 344601 + ... + 346510.

It is an arithmetic number, because the mean of its divisors is an integer number (99520128).

Almost surely, 2^660011005 is an apocalyptic number.

It is an amenable number.

660011005 is a deficient number, since it is larger than the sum of its proper divisors (136150019).

660011005 is a wasteful number, since it uses less digits than its factorization.

660011005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691307.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 660011005 is about 25690.6793409594. The cubic root of 660011005 is about 870.6636082823.

The spelling of 660011005 in words is "six hundred sixty million, eleven thousand, five".