66223460 has 12 divisors (see below), whose sum is σ = 139069308. Its totient is φ = 26489376.

The previous prime is 66223441. The next prime is 66223489. The reversal of 66223460 is 6432266.

It can be written as a sum of positive squares in 2 ways, for example, as 21921124 + 44302336 = 4682^2 + 6656^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1655567 + ... + 1655606.

It is an arithmetic number, because the mean of its divisors is an integer number (11589109).

Almost surely, 2^66223460 is an apocalyptic number.

It is an amenable number.

66223460 is an abundant number, since it is smaller than the sum of its proper divisors (72845848).

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

66223460 is a wasteful number, since it uses less digits than its factorization.

66223460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3311182 (or 3311180 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 66223460 is about 8137.7797954970. The cubic root of 66223460 is about 404.5795769269.

The spelling of 66223460 in words is "sixty-six million, two hundred twenty-three thousand, four hundred sixty".