66360870 has 56 divisors (see below), whose sum is σ = 179112096. Its totient is φ = 17694288.

The previous prime is 66360859. The next prime is 66360871. The reversal of 66360870 is 7806366.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66360871) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 2739 + ... + 11841.

Almost surely, 2^66360870 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66360870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89556048).

66360870 is an abundant number, since it is smaller than the sum of its proper divisors (112751226).

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

66360870 is an equidigital number, since it uses as much as digits as its factorization.

66360870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9128 (or 9113 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 66360870 is about 8146.2181409535. The cubic root of 66360870 is about 404.8592103224.

The spelling of 66360870 in words is "sixty-six million, three hundred sixty thousand, eight hundred seventy".