65377381 has 6 divisors (see below), whose sum is σ = 65848146. Its totient is φ = 64908000.

The previous prime is 65377379. The next prime is 65377387. The reversal of 65377381 is 18377356.

It can be written as a sum of positive squares in 3 ways, for example, as 11222500 + 54154881 = 3350^2 + 7359^2 .

It is not a de Polignac number, because 65377381 - 2¹ = 65377379 is a prime.

It is a super-2 number, since 2×65377381² = 8548403892838322, 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 (65377387) 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, 108481 + ... + 109081.

It is an arithmetic number, because the mean of its divisors is an integer number (10974691).

Almost surely, 2^65377381 is an apocalyptic number.

It is an amenable number.

65377381 is a deficient number, since it is larger than the sum of its proper divisors (470765).

65377381 is an frugal number, since it uses more digits than its factorization.

65377381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1383 (or 782 counting only the distinct ones).

The product of its digits is 105840, while the sum is 40.

The square root of 65377381 is about 8085.6280522913. The cubic root of 65377381 is about 402.8492007016.

The spelling of 65377381 in words is "sixty-five million, three hundred seventy-seven thousand, three hundred eighty-one".