66460545 has 24 divisors (see below), whose sum is σ = 115877736. Its totient is φ = 35236608.

The previous prime is 66460543. The next prime is 66460553. The reversal of 66460545 is 54506466.

It is a happy number.

66460545 is a `hidden beast` number, since 6 + 6 + 4 + 605 + 45 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 32901696 + 33558849 = 5736^2 + 5793^2 .

It is not a de Polignac number, because 66460545 - 2¹ = 66460543 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66460543) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3517 + ... + 12053.

It is an arithmetic number, because the mean of its divisors is an integer number (4828239).

Almost surely, 2^66460545 is an apocalyptic number.

It is an amenable number.

66460545 is a deficient number, since it is larger than the sum of its proper divisors (49417191).

66460545 is a wasteful number, since it uses less digits than its factorization.

66460545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8721 (or 8718 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The square root of 66460545 is about 8152.3337149555. Note that the first 3 decimals coincide. The cubic root of 66460545 is about 405.0618104107.

The spelling of 66460545 in words is "sixty-six million, four hundred sixty thousand, five hundred forty-five".