1666765101 has 8 divisors (see below), whose sum is σ = 2339319520. Its totient is φ = 1052693712.

The previous prime is 1666765091. The next prime is 1666765117. The reversal of 1666765101 is 1015676661.

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

It is not a de Polignac number, because 1666765101 - 2⁵ = 1666765069 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1666765101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666765201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14620690 + ... + 14620803.

It is an arithmetic number, because the mean of its divisors is an integer number (292414940).

Almost surely, 2^1666765101 is an apocalyptic number.

It is an amenable number.

1666765101 is a deficient number, since it is larger than the sum of its proper divisors (672554419).

1666765101 is a wasteful number, since it uses less digits than its factorization.

1666765101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29241515.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 1666765101 is about 40826.0345980356. The cubic root of 1666765101 is about 1185.6544423986.

The spelling of 1666765101 in words is "one billion, six hundred sixty-six million, seven hundred sixty-five thousand, one hundred one".