65554681 has 4 divisors (see below), whose sum is σ = 65947392. Its totient is φ = 65161972.

The previous prime is 65554679. The next prime is 65554711. The reversal of 65554681 is 18645556.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 65554681 - 2¹ = 65554679 is a prime.

It is a super-2 number, since 2×65554681² = 8594832402023522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65554081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 196105 + ... + 196438.

It is an arithmetic number, because the mean of its divisors is an integer number (16486848).

Almost surely, 2^65554681 is an apocalyptic number.

It is an amenable number.

65554681 is a deficient number, since it is larger than the sum of its proper divisors (392711).

65554681 is a wasteful number, since it uses less digits than its factorization.

65554681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392710.

The product of its digits is 144000, while the sum is 40.

The square root of 65554681 is about 8096.5845268236. The cubic root of 65554681 is about 403.2130405711.

It can be divided in two parts, 6555 and 4681, that added together give a square (11236 = 106²).

The spelling of 65554681 in words is "sixty-five million, five hundred fifty-four thousand, six hundred eighty-one".