66858430 has 8 divisors (see below), whose sum is σ = 120345192. Its totient is φ = 26743368.

The previous prime is 66858419. The next prime is 66858431. The reversal of 66858430 is 3485866.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66858431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3342912 + ... + 3342931.

It is an arithmetic number, because the mean of its divisors is an integer number (15043149).

Almost surely, 2^66858430 is an apocalyptic number.

66858430 is a deficient number, since it is larger than the sum of its proper divisors (53486762).

66858430 is a wasteful number, since it uses less digits than its factorization.

66858430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6685850.

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 66858430 is about 8176.7004347720. The cubic root of 66858430 is about 405.8685419725.

The spelling of 66858430 in words is "sixty-six million, eight hundred fifty-eight thousand, four hundred thirty".