66464041 has 6 divisors (see below), whose sum is σ = 77315370. Its totient is φ = 56969136.

The previous prime is 66464039. The next prime is 66464051. The reversal of 66464041 is 14046466.

It can be written as a sum of positive squares in only one way, i.e., 49000000 + 17464041 = 7000^2 + 4179^2 .

It is not a de Polignac number, because 66464041 - 2¹ = 66464039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66463994 and 66464012.

It is not an unprimeable number, because it can be changed into a prime (66464051) 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, 678156 + ... + 678253.

It is an arithmetic number, because the mean of its divisors is an integer number (12885895).

Almost surely, 2^66464041 is an apocalyptic number.

It is an amenable number.

66464041 is a deficient number, since it is larger than the sum of its proper divisors (10851329).

66464041 is a wasteful number, since it uses less digits than its factorization.

66464041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1356423 (or 1356416 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 66464041 is about 8152.5481292661. The cubic root of 66464041 is about 405.0689127261.

The spelling of 66464041 in words is "sixty-six million, four hundred sixty-four thousand, forty-one".