66310394 has 8 divisors (see below), whose sum is σ = 99609588. Its totient is φ = 33107200.

The previous prime is 66310393. The next prime is 66310411. The reversal of 66310394 is 49301366.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 65691025 + 619369 = 8105^2 + 787^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 66310394.

It is not an unprimeable number, because it can be changed into a prime (66310393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22247 + ... + 25050.

Almost surely, 2^66310394 is an apocalyptic number.

66310394 is a deficient number, since it is larger than the sum of its proper divisors (33299194).

66310394 is a wasteful number, since it uses less digits than its factorization.

66310394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48000.

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 66310394 is about 8143.1194268536. The cubic root of 66310394 is about 404.7565350711.

Subtracting from 66310394 its reverse (49301366), we obtain a triangular number (17009028 = T₅₈₃₂).

The spelling of 66310394 in words is "sixty-six million, three hundred ten thousand, three hundred ninety-four".