66149855 has 8 divisors (see below), whose sum is σ = 80005632. Its totient is φ = 52502688.

The previous prime is 66149833. The next prime is 66149893. The reversal of 66149855 is 55894166.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66149855 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 51452 + ... + 52721.

It is an arithmetic number, because the mean of its divisors is an integer number (10000704).

Almost surely, 2^66149855 is an apocalyptic number.

66149855 is a deficient number, since it is larger than the sum of its proper divisors (13855777).

66149855 is a wasteful number, since it uses less digits than its factorization.

66149855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104305.

The product of its digits is 259200, while the sum is 44.

The square root of 66149855 is about 8133.2561130214. The cubic root of 66149855 is about 404.4296294643.

The spelling of 66149855 in words is "sixty-six million, one hundred forty-nine thousand, eight hundred fifty-five".