1667284481 has 16 divisors (see below), whose sum is σ = 1730393280. Its totient is φ = 1605616320.

The previous prime is 1667284453. The next prime is 1667284483. The reversal of 1667284481 is 1844827661.

It is a cyclic number.

It is not a de Polignac number, because 1667284481 - 2³⁰ = 593542657 is a prime.

It is a super-2 number, since 2×1667284481² = 5559675081166878722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1667284483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 777671 + ... + 779811.

It is an arithmetic number, because the mean of its divisors is an integer number (108149580).

Almost surely, 2^1667284481 is an apocalyptic number.

It is an amenable number.

1667284481 is a deficient number, since it is larger than the sum of its proper divisors (63108799).

1667284481 is a wasteful number, since it uses less digits than its factorization.

1667284481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2464.

The product of its digits is 516096, while the sum is 47.

The square root of 1667284481 is about 40832.3949946608. The cubic root of 1667284481 is about 1185.7775833762. Note that the first 3 decimals are identical.

The spelling of 1667284481 in words is "one billion, six hundred sixty-seven million, two hundred eighty-four thousand, four hundred eighty-one".