1667730878052 has 48 divisors (see below), whose sum is σ = 4120597579392. Its totient is φ = 523168888320.

The previous prime is 1667730878027. The next prime is 1667730878053. The reversal of 1667730878052 is 2508780377661.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1667730878053) 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, 2358777 + ... + 2983167.

It is an arithmetic number, because the mean of its divisors is an integer number (85845782904).

Almost surely, 2^{1667730878052} is an apocalyptic number.

1667730878052 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1667730878052 is an abundant number, since it is smaller than the sum of its proper divisors (2452866701340).

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

1667730878052 is a wasteful number, since it uses less digits than its factorization.

1667730878052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637508 (or 637506 counting only the distinct ones).

The product of its (nonzero) digits is 23708160, while the sum is 60.

The spelling of 1667730878052 in words is "one trillion, six hundred sixty-seven billion, seven hundred thirty million, eight hundred seventy-eight thousand, fifty-two".