65994666 has 16 divisors (see below), whose sum is σ = 135209088. Its totient is φ = 21461600.

The previous prime is 65994641. The next prime is 65994667. The reversal of 65994666 is 66649956.

It is not an unprimeable number, because it can be changed into a prime (65994667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133890 + ... + 134381.

It is an arithmetic number, because the mean of its divisors is an integer number (8450568).

Almost surely, 2^65994666 is an apocalyptic number.

65994666 is an abundant number, since it is smaller than the sum of its proper divisors (69214422).

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

65994666 is a wasteful number, since it uses less digits than its factorization.

65994666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268317.

The product of its digits is 2099520, while the sum is 51.

The square root of 65994666 is about 8123.7101129964. The cubic root of 65994666 is about 404.1131149132.

The spelling of 65994666 in words is "sixty-five million, nine hundred ninety-four thousand, six hundred sixty-six".