1665166241 has 8 divisors (see below), whose sum is σ = 1721502144. Its totient is φ = 1609426800.

The previous prime is 1665166231. The next prime is 1665166247. The reversal of 1665166241 is 1426615661.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1665166241 - 2⁶ = 1665166177 is a prime.

It is a super-2 number, since 2×1665166241² = 5545557220332140162, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1665166195 and 1665166204.

It is not an unprimeable number, because it can be changed into a prime (1665166247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143435 + ... + 154608.

It is an arithmetic number, because the mean of its divisors is an integer number (215187768).

Almost surely, 2^1665166241 is an apocalyptic number.

It is an amenable number.

1665166241 is a deficient number, since it is larger than the sum of its proper divisors (56335903).

1665166241 is a wasteful number, since it uses less digits than its factorization.

1665166241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298231.

The product of its digits is 51840, while the sum is 38.

The square root of 1665166241 is about 40806.4485222618. The cubic root of 1665166241 is about 1185.2752044087.

The spelling of 1665166241 in words is "one billion, six hundred sixty-five million, one hundred sixty-six thousand, two hundred forty-one".