1665006101 has 12 divisors (see below), whose sum is σ = 1838153100. Its totient is φ = 1507007040.

The previous prime is 1665006089. The next prime is 1665006103. The reversal of 1665006101 is 1016005661.

It can be written as a sum of positive squares in 2 ways, for example, as 1619982001 + 45024100 = 40249^2 + 6710^2 .

It is not a de Polignac number, because 1665006101 - 2¹⁰ = 1665005077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1665006103) 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, 2336 + ... + 57753.

It is an arithmetic number, because the mean of its divisors is an integer number (153179425).

Almost surely, 2^1665006101 is an apocalyptic number.

1665006101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1665006101 is a deficient number, since it is larger than the sum of its proper divisors (173146999).

1665006101 is a wasteful number, since it uses less digits than its factorization.

1665006101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60340 (or 60329 counting only the distinct ones).

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

The square root of 1665006101 is about 40804.4862852113. The cubic root of 1665006101 is about 1185.2372069901.

The spelling of 1665006101 in words is "one billion, six hundred sixty-five million, six thousand, one hundred one".