66355194 has 16 divisors (see below), whose sum is σ = 133951968. Its totient is φ = 21911472.

The previous prime is 66355193. The next prime is 66355217. The reversal of 66355194 is 49155366.

It is not an unprimeable number, because it can be changed into a prime (66355193) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51037 + ... + 52320.

It is an arithmetic number, because the mean of its divisors is an integer number (8371998).

Almost surely, 2^66355194 is an apocalyptic number.

66355194 is an abundant number, since it is smaller than the sum of its proper divisors (67596774).

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

66355194 is a wasteful number, since it uses less digits than its factorization.

66355194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103469.

The product of its digits is 97200, while the sum is 39.

The square root of 66355194 is about 8145.8697509842. The cubic root of 66355194 is about 404.8476671424.

The spelling of 66355194 in words is "sixty-six million, three hundred fifty-five thousand, one hundred ninety-four".