66448655 has 48 divisors (see below), whose sum is σ = 103267584. Its totient is φ = 40642560.

The previous prime is 66448637. The next prime is 66448661. The reversal of 66448655 is 55684466.

It is not a de Polignac number, because 66448655 - 2¹⁰ = 66447631 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 98399 + ... + 99071.

It is an arithmetic number, because the mean of its divisors is an integer number (2151408).

Almost surely, 2^66448655 is an apocalyptic number.

66448655 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

66448655 is a deficient number, since it is larger than the sum of its proper divisors (36818929).

66448655 is a wasteful number, since it uses less digits than its factorization.

66448655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736 (or 729 counting only the distinct ones).

The product of its digits is 691200, while the sum is 44.

The square root of 66448655 is about 8151.6044432983. The cubic root of 66448655 is about 405.0376533605.

The spelling of 66448655 in words is "sixty-six million, four hundred forty-eight thousand, six hundred fifty-five".