660610055601 has 12 divisors (see below), whose sum is σ = 960068603728. Its totient is φ = 437704821144.

The previous prime is 660610055569. The next prime is 660610055603. The reversal of 660610055601 is 106550016066.

It is not a de Polignac number, because 660610055601 - 2⁵ = 660610055569 is a prime.

It is a super-3 number, since 3×660610055601³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (660610055603) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 225155335 + ... + 225158268.

Almost surely, 2^660610055601 is an apocalyptic number.

It is an amenable number.

660610055601 is a deficient number, since it is larger than the sum of its proper divisors (299458548127).

660610055601 is a wasteful number, since it uses less digits than its factorization.

660610055601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450313772 (or 450313769 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The spelling of 660610055601 in words is "six hundred sixty billion, six hundred ten million, fifty-five thousand, six hundred one".