65442666 has 16 divisors (see below), whose sum is σ = 131307264. Its totient is φ = 21743904.

The previous prime is 65442649. The next prime is 65442701. The reversal of 65442666 is 66624456.

It is a Curzon number.

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, 15546 + ... + 19301.

It is an arithmetic number, because the mean of its divisors is an integer number (8206704).

Almost surely, 2^65442666 is an apocalyptic number.

65442666 is an abundant number, since it is smaller than the sum of its proper divisors (65864598).

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

65442666 is a wasteful number, since it uses less digits than its factorization.

65442666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35165.

The product of its digits is 207360, while the sum is 39.

The square root of 65442666 is about 8089.6641463042. The cubic root of 65442666 is about 402.9832494110.

The spelling of 65442666 in words is "sixty-five million, four hundred forty-two thousand, six hundred sixty-six".