66677694 has 8 divisors (see below), whose sum is σ = 133355400. Its totient is φ = 22225896.

The previous prime is 66677693. The next prime is 66677719. The reversal of 66677694 is 49677666.

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

66677694 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66677693) 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 3 ways as a sum of consecutive naturals, for example, 5556469 + ... + 5556480.

It is an arithmetic number, because the mean of its divisors is an integer number (16669425).

Almost surely, 2^66677694 is an apocalyptic number.

66677694 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

66677694 is a wasteful number, since it uses less digits than its factorization.

66677694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11112954.

The product of its digits is 2286144, while the sum is 51.

The square root of 66677694 is about 8165.6410648522. The cubic root of 66677694 is about 405.5024886286.

The spelling of 66677694 in words is "sixty-six million, six hundred seventy-seven thousand, six hundred ninety-four".