65630387 has 4 divisors (see below), whose sum is σ = 69491016. Its totient is φ = 61769760.

The previous prime is 65630371. The next prime is 65630401. The reversal of 65630387 is 78303656.

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

It is a cyclic number.

It is not a de Polignac number, because 65630387 - 2⁴ = 65630371 is a prime.

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

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65630387.

It is not an unprimeable number, because it can be changed into a prime (65630687) 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, 1930289 + ... + 1930322.

It is an arithmetic number, because the mean of its divisors is an integer number (17372754).

Almost surely, 2^65630387 is an apocalyptic number.

65630387 is a deficient number, since it is larger than the sum of its proper divisors (3860629).

65630387 is a wasteful number, since it uses less digits than its factorization.

65630387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3860628.

The product of its (nonzero) digits is 90720, while the sum is 38.

The square root of 65630387 is about 8101.2583590452. The cubic root of 65630387 is about 403.3681980805.

The spelling of 65630387 in words is "sixty-five million, six hundred thirty thousand, three hundred eighty-seven".