660100 has 72 divisors (see below), whose sum is σ = 1749888. Its totient is φ = 211200.

The previous prime is 660097. The next prime is 660103. The reversal of 660100 is 1066.

660100 = T₈₁ + T₈₂ + ... + T₁₆₄.

It is an interprime number because it is at equal distance from previous prime (660097) and next prime (660103).

It is not an unprimeable number, because it can be changed into a prime (660103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16080 + ... + 16120.

It is an arithmetic number, because the mean of its divisors is an integer number (24304).

2⁶⁶⁰¹⁰⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 660100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (874944).

660100 is an abundant number, since it is smaller than the sum of its proper divisors (1089788).

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

660100 is a wasteful number, since it uses less digits than its factorization.

660100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85 (or 78 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 660100 is about 812.4653838780. The cubic root of 660100 is about 87.0702739562.

Adding to 660100 its reverse (1066), we get a palindrome (661166).

It can be divided in two parts, 6 and 60100, that added together give a palindrome (60106).

The spelling of 660100 in words is "six hundred sixty thousand, one hundred".