66754541 has 4 divisors (see below), whose sum is σ = 76290912. Its totient is φ = 57218172.

The previous prime is 66754537. The next prime is 66754559. The reversal of 66754541 is 14545766.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 14545766 = 2 ⋅7272883.

It is a cyclic number.

It is not a de Polignac number, because 66754541 - 2² = 66754537 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66754495 and 66754504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66754561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4768175 + ... + 4768188.

It is an arithmetic number, because the mean of its divisors is an integer number (19072728).

Almost surely, 2^66754541 is an apocalyptic number.

It is an amenable number.

66754541 is a deficient number, since it is larger than the sum of its proper divisors (9536371).

66754541 is an equidigital number, since it uses as much as digits as its factorization.

66754541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9536370.

The product of its digits is 100800, while the sum is 38.

The square root of 66754541 is about 8170.3452191447. The cubic root of 66754541 is about 405.6582113004.

The spelling of 66754541 in words is "sixty-six million, seven hundred fifty-four thousand, five hundred forty-one".