66540514 has 16 divisors (see below), whose sum is σ = 101592000. Its totient is φ = 32679504.

The previous prime is 66540511. The next prime is 66540521. The reversal of 66540514 is 41504566.

It is not an unprimeable number, because it can be changed into a prime (66540511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79852 + ... + 80680.

It is an arithmetic number, because the mean of its divisors is an integer number (6349500).

Almost surely, 2^66540514 is an apocalyptic number.

66540514 is a deficient number, since it is larger than the sum of its proper divisors (35051486).

66540514 is a wasteful number, since it uses less digits than its factorization.

66540514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1497.

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

The square root of 66540514 is about 8157.2369096404. The cubic root of 66540514 is about 405.2242095428.

The spelling of 66540514 in words is "sixty-six million, five hundred forty thousand, five hundred fourteen".