65620799 has 8 divisors (see below), whose sum is σ = 69666480. Its totient is φ = 61595776.

The previous prime is 65620783. The next prime is 65620829. The reversal of 65620799 is 99702656.

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 65620799 - 2⁴ = 65620783 is a prime.

It is a super-2 number, since 2×65620799² = 8612178522796802, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65620739) 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, 1652 + ... + 11574.

It is an arithmetic number, because the mean of its divisors is an integer number (8708310).

Almost surely, 2^65620799 is an apocalyptic number.

65620799 is a deficient number, since it is larger than the sum of its proper divisors (4045681).

65620799 is a wasteful number, since it uses less digits than its factorization.

65620799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10329.

The product of its (nonzero) digits is 204120, while the sum is 44.

The square root of 65620799 is about 8100.6665775108. Note that the first 3 decimals coincide. The cubic root of 65620799 is about 403.3485543209.

The spelling of 65620799 in words is "sixty-five million, six hundred twenty thousand, seven hundred ninety-nine".