66430830 has 64 divisors (see below), whose sum is σ = 167417856. Its totient is φ = 16848000.

The previous prime is 66430823. The next prime is 66430841. The reversal of 66430830 is 3803466.

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

It is a congruent 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, 56145 + ... + 57315.

It is an arithmetic number, because the mean of its divisors is an integer number (2615904).

Almost surely, 2^66430830 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66430830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83708928).

66430830 is an abundant number, since it is smaller than the sum of its proper divisors (100987026).

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

66430830 is a wasteful number, since it uses less digits than its factorization.

66430830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1273.

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

The square root of 66430830 is about 8150.5110269234. The cubic root of 66430830 is about 405.0014327034.

The spelling of 66430830 in words is "sixty-six million, four hundred thirty thousand, eight hundred thirty".