65630549 has 4 divisors (see below), whose sum is σ = 65649036. Its totient is φ = 65612064.

The previous prime is 65630533. The next prime is 65630561. The reversal of 65630549 is 94503656.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 62884900 + 2745649 = 7930^2 + 1657^2 .

It is a cyclic number.

It is not a de Polignac number, because 65630549 - 2⁴ = 65630533 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65630249) 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, 2054 + ... + 11639.

It is an arithmetic number, because the mean of its divisors is an integer number (16412259).

Almost surely, 2^65630549 is an apocalyptic number.

It is an amenable number.

65630549 is a deficient number, since it is larger than the sum of its proper divisors (18487).

65630549 is a wasteful number, since it uses less digits than its factorization.

65630549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18486.

The product of its (nonzero) digits is 97200, while the sum is 38.

The square root of 65630549 is about 8101.2683574858. The cubic root of 65630549 is about 403.3685299674.

The spelling of 65630549 in words is "sixty-five million, six hundred thirty thousand, five hundred forty-nine".