66553379 has 8 divisors (see below), whose sum is σ = 69220272. Its totient is φ = 63937440.

The previous prime is 66553369. The next prime is 66553381. The reversal of 66553379 is 97335566.

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 66553379 - 2¹² = 66549283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66553369) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10064 + ... + 15309.

It is an arithmetic number, because the mean of its divisors is an integer number (8652534).

Almost surely, 2^66553379 is an apocalyptic number.

66553379 is a deficient number, since it is larger than the sum of its proper divisors (2666893).

66553379 is a wasteful number, since it uses less digits than its factorization.

66553379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25477.

The product of its digits is 510300, while the sum is 44.

The square root of 66553379 is about 8158.0254351160. The cubic root of 66553379 is about 405.2503233252.

The spelling of 66553379 in words is "sixty-six million, five hundred fifty-three thousand, three hundred seventy-nine".