65394666 has 12 divisors (see below), whose sum is σ = 141688482. Its totient is φ = 21798216.

The previous prime is 65394661. The next prime is 65394683. The reversal of 65394666 is 66649356.

It can be written as a sum of positive squares in only one way, i.e., 45279441 + 20115225 = 6729^2 + 4485^2 .

It is not an unprimeable number, because it can be changed into a prime (65394661) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1816501 + ... + 1816536.

Almost surely, 2^65394666 is an apocalyptic number.

65394666 is an abundant number, since it is smaller than the sum of its proper divisors (76293816).

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

65394666 is a wasteful number, since it uses less digits than its factorization.

65394666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3633045 (or 3633042 counting only the distinct ones).

The product of its digits is 699840, while the sum is 45.

The square root of 65394666 is about 8086.6968534748. The cubic root of 65394666 is about 402.8847004150.

The spelling of 65394666 in words is "sixty-five million, three hundred ninety-four thousand, six hundred sixty-six".