66411481 has 4 divisors (see below), whose sum is σ = 66563200. Its totient is φ = 66259764.

The previous prime is 66411467. The next prime is 66411523. The reversal of 66411481 is 18411466.

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 66411481 - 2⁷ = 66411353 is a prime.

It is a super-2 number, since 2×66411481² = 8820969617226722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66411881) 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, 75201 + ... + 76078.

It is an arithmetic number, because the mean of its divisors is an integer number (16640800).

Almost surely, 2^66411481 is an apocalyptic number.

It is an amenable number.

66411481 is a deficient number, since it is larger than the sum of its proper divisors (151719).

66411481 is a wasteful number, since it uses less digits than its factorization.

66411481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151718.

The product of its digits is 4608, while the sum is 31.

The square root of 66411481 is about 8149.3239596914. The cubic root of 66411481 is about 404.9621079216.

The spelling of 66411481 in words is "sixty-six million, four hundred eleven thousand, four hundred eighty-one".