66214260 has 120 divisors (see below), whose sum is σ = 237431040. Its totient is φ = 15132096.

The previous prime is 66214241. The next prime is 66214277. The reversal of 66214260 is 6241266.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 8421 + ... + 14259.

It is an arithmetic number, because the mean of its divisors is an integer number (1978592).

Almost surely, 2^66214260 is an apocalyptic number.

66214260 is a gapful number since it is divisible by the number (60) 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 66214260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118715520).

66214260 is an abundant number, since it is smaller than the sum of its proper divisors (171216780).

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

66214260 is a wasteful number, since it uses less digits than its factorization.

66214260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5867 (or 5856 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 66214260 is about 8137.2145111211. The cubic root of 66214260 is about 404.5608408451.

The spelling of 66214260 in words is "sixty-six million, two hundred fourteen thousand, two hundred sixty".