65016649 has 4 divisors (see below), whose sum is σ = 65172240. Its totient is φ = 64861060.

The previous prime is 65016583. The next prime is 65016661. The reversal of 65016649 is 94661056.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 65016649 - 2¹¹ = 65014601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65916649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77167 + ... + 78004.

It is an arithmetic number, because the mean of its divisors is an integer number (16293060).

Almost surely, 2^65016649 is an apocalyptic number.

It is an amenable number.

65016649 is a deficient number, since it is larger than the sum of its proper divisors (155591).

65016649 is a wasteful number, since it uses less digits than its factorization.

65016649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155590.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 65016649 is about 8063.2902093376. The cubic root of 65016649 is about 402.1069016787.

The spelling of 65016649 in words is "sixty-five million, sixteen thousand, six hundred forty-nine".