65505066 has 32 divisors (see below), whose sum is σ = 143771328. Its totient is φ = 19731840.

The previous prime is 65505023. The next prime is 65505107. The reversal of 65505066 is 66050556.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8550 + ... + 14286.

It is an arithmetic number, because the mean of its divisors is an integer number (4492854).

Almost surely, 2^65505066 is an apocalyptic number.

65505066 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

65505066 is an abundant number, since it is smaller than the sum of its proper divisors (78266262).

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

65505066 is a wasteful number, since it uses less digits than its factorization.

65505066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5926.

The product of its (nonzero) digits is 27000, while the sum is 33.

The square root of 65505066 is about 8093.5200005931. The cubic root of 65505066 is about 403.1112910908. Note that the first 3 decimals are identical.

Subtracting 65505066 from its reverse (66050556), we obtain a triangular number (545490 = T₁₀₄₄).

The spelling of 65505066 in words is "sixty-five million, five hundred five thousand, sixty-six".