1666653546 has 8 divisors (see below), whose sum is σ = 3333307104. Its totient is φ = 555551180.

The previous prime is 1666653467. The next prime is 1666653557. The reversal of 1666653546 is 6453566661.

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

1666653546 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 1666653495 and 1666653504.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138887790 + ... + 138887801.

It is an arithmetic number, because the mean of its divisors is an integer number (416663388).

Almost surely, 2^1666653546 is an apocalyptic number.

1666653546 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1666653546 is a wasteful number, since it uses less digits than its factorization.

1666653546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277775596.

The product of its digits is 2332800, while the sum is 48.

The square root of 1666653546 is about 40824.6683513779. The cubic root of 1666653546 is about 1185.6279902344.

The spelling of 1666653546 in words is "one billion, six hundred sixty-six million, six hundred fifty-three thousand, five hundred forty-six".