1666910151270 has 1280 divisors, whose sum is σ = 6063409820160. Its totient is φ = 318616436736.

The previous prime is 1666910151259. The next prime is 1666910151301. The reversal of 1666910151270 is 721510196661.

It is a super-2 number, since 2×1666910151270² (a number of 25 digits) contains 22 as substring.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 639 ways as a sum of consecutive naturals, for example, 7279083516 + ... + 7279083744.

It is an arithmetic number, because the mean of its divisors is an integer number (4737038922).

Almost surely, 2^{1666910151270} is an apocalyptic number.

1666910151270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1666910151270, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3031704910080).

1666910151270 is an abundant number, since it is smaller than the sum of its proper divisors (4396499668890).

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

1666910151270 is a wasteful number, since it uses less digits than its factorization.

1666910151270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479 (or 470 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The spelling of 1666910151270 in words is "one trillion, six hundred sixty-six billion, nine hundred ten million, one hundred fifty-one thousand, two hundred seventy".