1664367701020 has 12 divisors (see below), whose sum is σ = 3495172172184. Its totient is φ = 665747080400.

The previous prime is 1664367700997. The next prime is 1664367701119. The reversal of 1664367701020 is 201077634661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41609192506 + ... + 41609192545.

It is an arithmetic number, because the mean of its divisors is an integer number (291264347682).

Almost surely, 2^{1664367701020} is an apocalyptic number.

1664367701020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1664367701020 is an abundant number, since it is smaller than the sum of its proper divisors (1830804471164).

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

1664367701020 is a wasteful number, since it uses less digits than its factorization.

1664367701020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83218385060 (or 83218385058 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 43.

The spelling of 1664367701020 in words is "one trillion, six hundred sixty-four billion, three hundred sixty-seven million, seven hundred one thousand, twenty".