66866430 has 48 divisors (see below), whose sum is σ = 164129040. Its totient is φ = 17434368.

The previous prime is 66866417. The next prime is 66866483. The reversal of 66866430 is 3466866.

It is a super-2 number, since 2×66866430² = 8942238921889800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 65766 + ... + 66774.

It is an arithmetic number, because the mean of its divisors is an integer number (3419355).

Almost surely, 2^66866430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66866430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82064520).

66866430 is an abundant number, since it is smaller than the sum of its proper divisors (97262610).

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

66866430 is a wasteful number, since it uses less digits than its factorization.

66866430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1113 (or 1066 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 39.

The square root of 66866430 is about 8177.1896150206. The cubic root of 66866430 is about 405.8847295041.

The spelling of 66866430 in words is "sixty-six million, eight hundred sixty-six thousand, four hundred thirty".