65506066 has 8 divisors (see below), whose sum is σ = 104039100. Its totient is φ = 30826368.

The previous prime is 65506061. The next prime is 65506081. The reversal of 65506066 is 66060556.

It can be written as a sum of positive squares in 2 ways, for example, as 56927025 + 8579041 = 7545^2 + 2929^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (34), and also a Moran number because the ratio is a prime number: 1926649 = 65506066 / (6 + 5 + 5 + 0 + 6 + 0 + 6 + 6).

It is not an unprimeable number, because it can be changed into a prime (65506061) 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, 963291 + ... + 963358.

Almost surely, 2^65506066 is an apocalyptic number.

65506066 is a deficient number, since it is larger than the sum of its proper divisors (38533034).

65506066 is a wasteful number, since it uses less digits than its factorization.

65506066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1926668.

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 65506066 is about 8093.5817781746. The cubic root of 65506066 is about 403.1133423787.

The spelling of 65506066 in words is "sixty-five million, five hundred six thousand, sixty-six".