66634016 has 24 divisors (see below), whose sum is σ = 138903660. Its totient is φ = 31356928.

The previous prime is 66633991. The next prime is 66634027. The reversal of 66634016 is 61043666.

It can be written as a sum of positive squares in 2 ways, for example, as 60777616 + 5856400 = 7796^2 + 2420^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60701 + ... + 61788.

Almost surely, 2^66634016 is an apocalyptic number.

It is an amenable number.

66634016 is an abundant number, since it is smaller than the sum of its proper divisors (72269644).

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

66634016 is a wasteful number, since it uses less digits than its factorization.

66634016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122516 (or 122508 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 66634016 is about 8162.9661275789. The cubic root of 66634016 is about 405.4139262453.

The spelling of 66634016 in words is "sixty-six million, six hundred thirty-four thousand, sixteen".