65880381 has 32 divisors (see below), whose sum is σ = 102816000. Its totient is φ = 36748800.

The previous prime is 65880377. The next prime is 65880401. The reversal of 65880381 is 18308856.

It is a happy number.

It is not a de Polignac number, because 65880381 - 2² = 65880377 is a prime.

It is a super-2 number, since 2×65880381² = 8680449201410322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65880181) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 188595 + ... + 188943.

It is an arithmetic number, because the mean of its divisors is an integer number (3213000).

Almost surely, 2^65880381 is an apocalyptic number.

It is an amenable number.

65880381 is a deficient number, since it is larger than the sum of its proper divisors (36935619).

65880381 is a wasteful number, since it uses less digits than its factorization.

65880381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549.

The product of its (nonzero) digits is 46080, while the sum is 39.

The square root of 65880381 is about 8116.6730253226. The cubic root of 65880381 is about 403.8797084110.

The spelling of 65880381 in words is "sixty-five million, eight hundred eighty thousand, three hundred eighty-one".