162666680 has 128 divisors (see below), whose sum is σ = 418037760. Its totient is φ = 56448000.

The previous prime is 162666677. The next prime is 162666683. The reversal of 162666680 is 86666261.

162666680 = T₂₁₀₅ + T₂₁₀₆ + ... + T₂₁₇₅.

It is an interprime number because it is at equal distance from previous prime (162666677) and next prime (162666683).

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (162666683) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1280777 + ... + 1280903.

It is an arithmetic number, because the mean of its divisors is an integer number (3265920).

Almost surely, 2^162666680 is an apocalyptic number.

162666680 is a gapful number since it is divisible by the number (10) 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 162666680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (209018880).

162666680 is an abundant number, since it is smaller than the sum of its proper divisors (255371080).

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

162666680 is a wasteful number, since it uses less digits than its factorization.

162666680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261 (or 257 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 41.

The square root of 162666680 is about 12754.0848358477. The cubic root of 162666680 is about 545.8829555855.

The spelling of 162666680 in words is "one hundred sixty-two million, six hundred sixty-six thousand, six hundred eighty".