66454540 has 12 divisors (see below), whose sum is σ = 139554576. Its totient is φ = 26581808.

The previous prime is 66454529. The next prime is 66454561. The reversal of 66454540 is 4545466.

It is a super-2 number, since 2×66454540² = 8832411773223200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66454496 and 66454505.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1661344 + ... + 1661383.

It is an arithmetic number, because the mean of its divisors is an integer number (11629548).

Almost surely, 2^66454540 is an apocalyptic number.

It is an amenable number.

66454540 is an abundant number, since it is smaller than the sum of its proper divisors (73100036).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66454540 is a wasteful number, since it uses less digits than its factorization.

66454540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3322736 (or 3322734 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 34.

The square root of 66454540 is about 8151.9654071886. The cubic root of 66454540 is about 405.0496103430.

It can be divided in two parts, 6 and 6454540, that added together give a palindrome (6454546).

The spelling of 66454540 in words is "sixty-six million, four hundred fifty-four thousand, five hundred forty".