66520352 has 24 divisors (see below), whose sum is σ = 131169276. Its totient is φ = 33207552.

The previous prime is 66520351. The next prime is 66520367. The reversal of 66520352 is 25302566.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 66520336 + 16 = 8156^2 + 4^2 .

It is not an unprimeable number, because it can be changed into a prime (66520351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26078 + ... + 28514.

Almost surely, 2^66520352 is an apocalyptic number.

It is an amenable number.

66520352 is a deficient number, since it is larger than the sum of its proper divisors (64648924).

66520352 is a wasteful number, since it uses less digits than its factorization.

66520352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3300 (or 3292 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 66520352 is about 8156.0009808729. Note that the first 3 decimals coincide. The cubic root of 66520352 is about 405.1832773079.

The spelling of 66520352 in words is "sixty-six million, five hundred twenty thousand, three hundred fifty-two".