65491634 has 16 divisors (see below), whose sum is σ = 105954072. Its totient is φ = 30181248.

The previous prime is 65491627. The next prime is 65491661. The reversal of 65491634 is 43619456.

It can be written as a sum of positive squares in 4 ways, for example, as 39000025 + 26491609 = 6245^2 + 5147^2 .

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, 20702 + ... + 23654.

Almost surely, 2^65491634 is an apocalyptic number.

65491634 is a deficient number, since it is larger than the sum of its proper divisors (40462438).

65491634 is a wasteful number, since it uses less digits than its factorization.

65491634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3821.

The product of its digits is 77760, while the sum is 38.

The square root of 65491634 is about 8092.6901584084. The cubic root of 65491634 is about 403.0837361686.

The spelling of 65491634 in words is "sixty-five million, four hundred ninety-one thousand, six hundred thirty-four".