66054145 has 8 divisors (see below), whose sum is σ = 79471080. Its totient is φ = 52705920.

The previous prime is 66054143. The next prime is 66054151. The reversal of 66054145 is 54145066.

It can be written as a sum of positive squares in 4 ways, for example, as 638401 + 65415744 = 799^2 + 8088^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66054145 - 2¹ = 66054143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66054143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15036 + ... + 18925.

It is an arithmetic number, because the mean of its divisors is an integer number (9933885).

Almost surely, 2^66054145 is an apocalyptic number.

It is an amenable number.

66054145 is a deficient number, since it is larger than the sum of its proper divisors (13416935).

66054145 is a wasteful number, since it uses less digits than its factorization.

66054145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34355.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 66054145 is about 8127.3701158493. The cubic root of 66054145 is about 404.2344834419.

The spelling of 66054145 in words is "sixty-six million, fifty-four thousand, one hundred forty-five".