66654411 has 4 divisors (see below), whose sum is σ = 88872552. Its totient is φ = 44436272.

The previous prime is 66654407. The next prime is 66654421. The reversal of 66654411 is 11445666.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66654411 - 2² = 66654407 is a prime.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (66654421) 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, 11109066 + ... + 11109071.

It is an arithmetic number, because the mean of its divisors is an integer number (22218138).

Almost surely, 2^66654411 is an apocalyptic number.

66654411 is a deficient number, since it is larger than the sum of its proper divisors (22218141).

66654411 is a wasteful number, since it uses less digits than its factorization.

66654411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22218140.

The product of its digits is 17280, while the sum is 33.

The square root of 66654411 is about 8164.2152715371. The cubic root of 66654411 is about 405.4552843687.

The spelling of 66654411 in words is "sixty-six million, six hundred fifty-four thousand, four hundred eleven".