65320691 has 8 divisors (see below), whose sum is σ = 66562704. Its totient is φ = 64084320.

The previous prime is 65320679. The next prime is 65320699. The reversal of 65320691 is 19602356.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 65320691 - 2¹⁸ = 65058547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65320699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27341 + ... + 29633.

It is an arithmetic number, because the mean of its divisors is an integer number (8320338).

Almost surely, 2^65320691 is an apocalyptic number.

65320691 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

65320691 is a deficient number, since it is larger than the sum of its proper divisors (1242013).

65320691 is a wasteful number, since it uses less digits than its factorization.

65320691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2821.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 65320691 is about 8082.1216892596. The cubic root of 65320691 is about 402.7327275679.

The spelling of 65320691 in words is "sixty-five million, three hundred twenty thousand, six hundred ninety-one".