1660105601 has 48 divisors (see below), whose sum is σ = 2247168000. Its totient is φ = 1196506080.

The previous prime is 1660105553. The next prime is 1660105619. The reversal of 1660105601 is 1065010661.

It is not a de Polignac number, because 1660105601 - 2⁶ = 1660105537 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1660105631) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 690800 + ... + 693198.

It is an arithmetic number, because the mean of its divisors is an integer number (46816000).

Almost surely, 2^1660105601 is an apocalyptic number.

1660105601 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1660105601 is a deficient number, since it is larger than the sum of its proper divisors (587062399).

1660105601 is a wasteful number, since it uses less digits than its factorization.

1660105601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2490 (or 2479 counting only the distinct ones).

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

The square root of 1660105601 is about 40744.3934916204. The cubic root of 1660105601 is about 1184.0732547753.

The spelling of 1660105601 in words is "one billion, six hundred sixty million, one hundred five thousand, six hundred one".