66434610 has 64 divisors (see below), whose sum is σ = 178671744. Its totient is φ = 15667200.

The previous prime is 66434609. The next prime is 66434639. The reversal of 66434610 is 1643466.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9490 + ... + 14930.

It is an arithmetic number, because the mean of its divisors is an integer number (2791746).

Almost surely, 2^66434610 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66434610, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89335872).

66434610 is an abundant number, since it is smaller than the sum of its proper divisors (112237134).

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

66434610 is a wasteful number, since it uses less digits than its factorization.

66434610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5499.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 66434610 is about 8150.7429109254. The cubic root of 66434610 is about 405.0091142591.

The spelling of 66434610 in words is "sixty-six million, four hundred thirty-four thousand, six hundred ten".