1667440668 has 48 divisors (see below), whose sum is σ = 4005832320. Its totient is φ = 539440704.

The previous prime is 1667440661. The next prime is 1667440693. The reversal of 1667440668 is 8660447661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1667440661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 181555 + ... + 190517.

It is an arithmetic number, because the mean of its divisors is an integer number (83454840).

Almost surely, 2^1667440668 is an apocalyptic number.

It is an amenable number.

1667440668 is an abundant number, since it is smaller than the sum of its proper divisors (2338391652).

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

1667440668 is a wasteful number, since it uses less digits than its factorization.

1667440668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9426 (or 9424 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 48.

The square root of 1667440668 is about 40834.3074876996. The cubic root of 1667440668 is about 1185.8146091033.

The spelling of 1667440668 in words is "one billion, six hundred sixty-seven million, four hundred forty thousand, six hundred sixty-eight".