66694134 has 32 divisors (see below), whose sum is σ = 145684224. Its totient is φ = 20230560.

The previous prime is 66694129. The next prime is 66694139. The reversal of 66694134 is 43149666.

It is an interprime number because it is at equal distance from previous prime (66694129) and next prime (66694139).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 66694092 and 66694101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66694139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 484 + ... + 11559.

It is an arithmetic number, because the mean of its divisors is an integer number (4552632).

Almost surely, 2^66694134 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66694134, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72842112).

66694134 is an abundant number, since it is smaller than the sum of its proper divisors (78990090).

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

66694134 is a wasteful number, since it uses less digits than its factorization.

66694134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12132.

The product of its digits is 93312, while the sum is 39.

The square root of 66694134 is about 8166.6476598418. The cubic root of 66694134 is about 405.5358126819.

The spelling of 66694134 in words is "sixty-six million, six hundred ninety-four thousand, one hundred thirty-four".