66553495 has 8 divisors (see below), whose sum is σ = 80270784. Its totient is φ = 52971744.

The previous prime is 66553493. The next prime is 66553499. The reversal of 66553495 is 59435566.

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 66553495 - 2¹ = 66553493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66553493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32799 + ... + 34768.

It is an arithmetic number, because the mean of its divisors is an integer number (10033848).

Almost surely, 2^66553495 is an apocalyptic number.

66553495 is a deficient number, since it is larger than the sum of its proper divisors (13717289).

66553495 is a wasteful number, since it uses less digits than its factorization.

66553495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67769.

The product of its digits is 486000, while the sum is 43.

The square root of 66553495 is about 8158.0325446764. The cubic root of 66553495 is about 405.2505587704.

The spelling of 66553495 in words is "sixty-six million, five hundred fifty-three thousand, four hundred ninety-five".