65520066 has 16 divisors (see below), whose sum is σ = 131605344. Its totient is φ = 21745824.

The previous prime is 65520053. The next prime is 65520071. The reversal of 65520066 is 66002556.

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, 22036 + ... + 24831.

It is an arithmetic number, because the mean of its divisors is an integer number (8225334).

Almost surely, 2^65520066 is an apocalyptic number.

65520066 is an abundant number, since it is smaller than the sum of its proper divisors (66085278).

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

65520066 is a wasteful number, since it uses less digits than its factorization.

65520066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47105.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 65520066 is about 8094.4466148094. The cubic root of 65520066 is about 403.1420582169.

The spelling of 65520066 in words is "sixty-five million, five hundred twenty thousand, sixty-six".