66554466 has 16 divisors (see below), whose sum is σ = 145209888. Its totient is φ = 20168000.

The previous prime is 66554447. The next prime is 66554471. The reversal of 66554466 is 66445566.

It is a happy number.

It is a zygodrome in base 10.

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, 504135 + ... + 504266.

It is an arithmetic number, because the mean of its divisors is an integer number (9075618).

Almost surely, 2^66554466 is an apocalyptic number.

66554466 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

66554466 is an abundant number, since it is smaller than the sum of its proper divisors (78655422).

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

66554466 is a wasteful number, since it uses less digits than its factorization.

66554466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1008417.

The product of its digits is 518400, while the sum is 42.

The square root of 66554466 is about 8158.0920563573. The cubic root of 66554466 is about 405.2525295979.

Subtracting from 66554466 its reverse (66445566), we obtain a square (108900 = 330²).

The spelling of 66554466 in words is "sixty-six million, five hundred fifty-four thousand, four hundred sixty-six".