66551466 has 32 divisors (see below), whose sum is σ = 139471488. Its totient is φ = 21130560.

The previous prime is 66551453. The next prime is 66551473. The reversal of 66551466 is 66415566.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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 15 ways as a sum of consecutive naturals, for example, 37356 + ... + 39096.

It is an arithmetic number, because the mean of its divisors is an integer number (4358484).

Almost surely, 2^66551466 is an apocalyptic number.

66551466 is an abundant number, since it is smaller than the sum of its proper divisors (72920022).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66551466 is a wasteful number, since it uses less digits than its factorization.

66551466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2046.

The product of its digits is 129600, while the sum is 39.

The square root of 66551466 is about 8157.9081877648. The cubic root of 66551466 is about 405.2464404706.

The spelling of 66551466 in words is "sixty-six million, five hundred fifty-one thousand, four hundred sixty-six".