2640544166 has 8 divisors (see below), whose sum is σ = 4265494464. Its totient is φ = 1218712680.

The previous prime is 2640544157. The next prime is 2640544199. The reversal of 2640544166 is 6614450462.

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

It is a super-3 number, since 3×2640544166³ (a number of 29 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50779670 + ... + 50779721.

It is an arithmetic number, because the mean of its divisors is an integer number (533186808).

Almost surely, 2^2640544166 is an apocalyptic number.

2640544166 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2640544166 is a deficient number, since it is larger than the sum of its proper divisors (1624950298).

2640544166 is a wasteful number, since it uses less digits than its factorization.

2640544166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101559406.

The product of its (nonzero) digits is 138240, while the sum is 38.

The square root of 2640544166 is about 51386.2254500172. The cubic root of 2640544166 is about 1382.1795995130.

The spelling of 2640544166 in words is "two billion, six hundred forty million, five hundred forty-four thousand, one hundred sixty-six".