65380581 has 32 divisors (see below), whose sum is σ = 114278400. Its totient is φ = 36151920.

The previous prime is 65380573. The next prime is 65380583. The reversal of 65380581 is 18508356.

It is not a de Polignac number, because 65380581 - 2³ = 65380573 is a prime.

It is a super-2 number, since 2×65380581² = 8549240743795122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65380583) 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, 280 + ... + 11438.

It is an arithmetic number, because the mean of its divisors is an integer number (3571200).

Almost surely, 2^65380581 is an apocalyptic number.

It is an amenable number.

65380581 is a deficient number, since it is larger than the sum of its proper divisors (48897819).

65380581 is a wasteful number, since it uses less digits than its factorization.

65380581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11206 (or 11200 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 65380581 is about 8085.8259318390. The cubic root of 65380581 is about 402.8557732929.

The spelling of 65380581 in words is "sixty-five million, three hundred eighty thousand, five hundred eighty-one".