65624065 has 8 divisors (see below), whose sum is σ = 84806568. Its totient is φ = 48460800.

The previous prime is 65624047. The next prime is 65624077. The reversal of 65624065 is 56042656.

It can be written as a sum of positive squares in 4 ways, for example, as 531441 + 65092624 = 729^2 + 8068^2 .

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

It is not a de Polignac number, because 65624065 - 2²³ = 57235457 is a prime.

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 65624065.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 504736 + ... + 504865.

It is an arithmetic number, because the mean of its divisors is an integer number (10600821).

Almost surely, 2^65624065 is an apocalyptic number.

65624065 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

65624065 is a deficient number, since it is larger than the sum of its proper divisors (19182503).

65624065 is a wasteful number, since it uses less digits than its factorization.

65624065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1009619.

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 65624065 is about 8100.8681633514. The cubic root of 65624065 is about 403.3552458706.

The spelling of 65624065 in words is "sixty-five million, six hundred twenty-four thousand, sixty-five".