65656331 has 6 divisors (see below), whose sum is σ = 71095500. Its totient is φ = 60605688.

The previous prime is 65656309. The next prime is 65656351. The reversal of 65656331 is 13365656.

It is a de Polignac number, because none of the positive numbers 2^k-65656331 is a prime.

It is a super-2 number, since 2×65656331² = 8621507600763122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65656291 and 65656300.

It is not an unprimeable number, because it can be changed into a prime (65656351) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 194081 + ... + 194418.

It is an arithmetic number, because the mean of its divisors is an integer number (11849250).

Almost surely, 2^65656331 is an apocalyptic number.

65656331 is a deficient number, since it is larger than the sum of its proper divisors (5439169).

65656331 is a wasteful number, since it uses less digits than its factorization.

65656331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388525 (or 388512 counting only the distinct ones).

The product of its digits is 48600, while the sum is 35.

The square root of 65656331 is about 8102.8594335580. The cubic root of 65656331 is about 403.4213421923.

The spelling of 65656331 in words is "sixty-five million, six hundred fifty-six thousand, three hundred thirty-one".