66409448 has 16 divisors (see below), whose sum is σ = 142306080. Its totient is φ = 28461168.

The previous prime is 66409433. The next prime is 66409451. The reversal of 66409448 is 84490466.

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, 592886 + ... + 592997.

It is an arithmetic number, because the mean of its divisors is an integer number (8894130).

Almost surely, 2^66409448 is an apocalyptic number.

It is an amenable number.

66409448 is an abundant number, since it is smaller than the sum of its proper divisors (75896632).

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

66409448 is a wasteful number, since it uses less digits than its factorization.

66409448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1185896 (or 1185892 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 41.

The square root of 66409448 is about 8149.1992244637. The cubic root of 66409448 is about 404.9579756223.

The spelling of 66409448 in words is "sixty-six million, four hundred nine thousand, four hundred forty-eight".