66349655 has 8 divisors (see below), whose sum is σ = 79733472. Its totient is φ = 53003808.

The previous prime is 66349597. The next prime is 66349663. The reversal of 66349655 is 55694366.

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

It is a cyclic number.

It is not a de Polignac number, because 66349655 - 2²² = 62155351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5492 + ... + 12761.

It is an arithmetic number, because the mean of its divisors is an integer number (9966684).

Almost surely, 2^66349655 is an apocalyptic number.

66349655 is a deficient number, since it is larger than the sum of its proper divisors (13383817).

66349655 is a wasteful number, since it uses less digits than its factorization.

66349655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18985.

The product of its digits is 583200, while the sum is 44.

The square root of 66349655 is about 8145.5297556390. The cubic root of 66349655 is about 404.8364019422.

The spelling of 66349655 in words is "sixty-six million, three hundred forty-nine thousand, six hundred fifty-five".