1667047680 has 108 divisors (see below), whose sum is σ = 5767851180. Its totient is φ = 444542976.

The previous prime is 1667047667. The next prime is 1667047699. The reversal of 1667047680 is 867407661.

It can be written as a sum of positive squares in 2 ways, for example, as 325730304 + 1341317376 = 18048^2 + 36624^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60835 + ... + 83874.

Almost surely, 2^1667047680 is an apocalyptic number.

1667047680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1667047680 is an abundant number, since it is smaller than the sum of its proper divisors (4100803500).

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

1667047680 is a wasteful number, since it uses less digits than its factorization.

1667047680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144736 (or 144719 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 1667047680 is about 40829.4952209796. The cubic root of 1667047680 is about 1185.7214428644.

The spelling of 1667047680 in words is "one billion, six hundred sixty-seven million, forty-seven thousand, six hundred eighty".