1660515164256 has 192 divisors, whose sum is σ = 4778259837120. Its totient is φ = 501831106560.

The previous prime is 1660515164249. The next prime is 1660515164263. The reversal of 1660515164256 is 6524615150661.

It is an interprime number because it is at equal distance from previous prime (1660515164249) and next prime (1660515164263).

It is a super-2 number, since 2×1660515164256² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21918250 + ... + 21993878.

It is an arithmetic number, because the mean of its divisors is an integer number (24886769985).

Almost surely, 2^{1660515164256} is an apocalyptic number.

1660515164256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1660515164256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2389129918560).

1660515164256 is an abundant number, since it is smaller than the sum of its proper divisors (3117744672864).

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

1660515164256 is a wasteful number, since it uses less digits than its factorization.

1660515164256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75969 (or 75961 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 48.

The spelling of 1660515164256 in words is "one trillion, six hundred sixty billion, five hundred fifteen million, one hundred sixty-four thousand, two hundred fifty-six".