66061260 has 36 divisors (see below), whose sum is σ = 200386368. Its totient is φ = 17616288.

The previous prime is 66061253. The next prime is 66061321. The reversal of 66061260 is 6216066.

It is a tau number, because it is divible by the number of its divisors (36).

It is a zygodrome in base 2.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 183324 + ... + 183683.

It is an arithmetic number, because the mean of its divisors is an integer number (5566288).

Almost surely, 2^66061260 is an apocalyptic number.

66061260 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66061260 is an abundant number, since it is smaller than the sum of its proper divisors (134325108).

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

66061260 is a wasteful number, since it uses less digits than its factorization.

66061260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367022 (or 367017 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 66061260 is about 8127.8078225312. The cubic root of 66061260 is about 404.2489969145.

The spelling of 66061260 in words is "sixty-six million, sixty-one thousand, two hundred sixty".