1666162459 has 8 divisors (see below), whose sum is σ = 1888767440. Its totient is φ = 1457048736.

The previous prime is 1666162457. The next prime is 1666162493. The reversal of 1666162459 is 9542616661.

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

It is not a de Polignac number, because 1666162459 - 2¹ = 1666162457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1666162457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3372552 + ... + 3373045.

It is an arithmetic number, because the mean of its divisors is an integer number (236095930).

Almost surely, 2^1666162459 is an apocalyptic number.

1666162459 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1666162459 is a deficient number, since it is larger than the sum of its proper divisors (222604981).

1666162459 is a wasteful number, since it uses less digits than its factorization.

1666162459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6745629.

The product of its digits is 466560, while the sum is 46.

The square root of 1666162459 is about 40818.6533217352. The cubic root of 1666162459 is about 1185.5115285797.

The spelling of 1666162459 in words is "one billion, six hundred sixty-six million, one hundred sixty-two thousand, four hundred fifty-nine".