66361678 has 8 divisors (see below), whose sum is σ = 99989568. Its totient is φ = 33031824.

The previous prime is 66361663. The next prime is 66361709. The reversal of 66361678 is 87616366.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73951 + ... + 74842.

It is an arithmetic number, because the mean of its divisors is an integer number (12498696).

Almost surely, 2^66361678 is an apocalyptic number.

66361678 is a deficient number, since it is larger than the sum of its proper divisors (33627890).

66361678 is a wasteful number, since it uses less digits than its factorization.

66361678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149018.

The product of its digits is 217728, while the sum is 43.

The square root of 66361678 is about 8146.2677343677. The cubic root of 66361678 is about 404.8608534841.

The spelling of 66361678 in words is "sixty-six million, three hundred sixty-one thousand, six hundred seventy-eight".