66054061 has 4 divisors (see below), whose sum is σ = 69939612. Its totient is φ = 62168512.

The previous prime is 66054031. The next prime is 66054077. The reversal of 66054061 is 16045066.

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

It can be written as a sum of positive squares in 2 ways, for example, as 47692836 + 18361225 = 6906^2 + 4285^2 .

It is a cyclic number.

It is not a de Polignac number, because 66054061 - 2¹³ = 66045869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66054031) 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, 1942750 + ... + 1942783.

It is an arithmetic number, because the mean of its divisors is an integer number (17484903).

Almost surely, 2^66054061 is an apocalyptic number.

It is an amenable number.

66054061 is a deficient number, since it is larger than the sum of its proper divisors (3885551).

66054061 is a wasteful number, since it uses less digits than its factorization.

66054061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3885550.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 66054061 is about 8127.3649481243. The cubic root of 66054061 is about 404.2343120889.

The spelling of 66054061 in words is "sixty-six million, fifty-four thousand, sixty-one".