1666151676 has 72 divisors (see below), whose sum is σ = 4830906080. Its totient is φ = 474304896.

The previous prime is 1666151653. The next prime is 1666151687. The reversal of 1666151676 is 6761516661.

It is a super-2 number, since 2×1666151676² = 5552122814875217952, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 57870 + ... + 81738.

Almost surely, 2^1666151676 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1666151676, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2415453040).

1666151676 is an abundant number, since it is smaller than the sum of its proper divisors (3164754404).

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

1666151676 is a wasteful number, since it uses less digits than its factorization.

1666151676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24163 (or 24158 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 1666151676 is about 40818.5212373011. The cubic root of 1666151676 is about 1185.5089711263.

The spelling of 1666151676 in words is "one billion, six hundred sixty-six million, one hundred fifty-one thousand, six hundred seventy-six".