66917741 has 16 divisors (see below), whose sum is σ = 77483520. Its totient is φ = 57190320.

The previous prime is 66917701. The next prime is 66917743. The reversal of 66917741 is 14771966.

It is a de Polignac number, because none of the positive numbers 2^k-66917741 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66917743) 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 15 ways as a sum of consecutive naturals, for example, 12686 + ... + 17168.

It is an arithmetic number, because the mean of its divisors is an integer number (4842720).

Almost surely, 2^66917741 is an apocalyptic number.

It is an amenable number.

66917741 is a deficient number, since it is larger than the sum of its proper divisors (10565779).

66917741 is a wasteful number, since it uses less digits than its factorization.

66917741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4576.

The product of its digits is 63504, while the sum is 41.

The square root of 66917741 is about 8180.3264604782. The cubic root of 66917741 is about 405.9885236226.

The spelling of 66917741 in words is "sixty-six million, nine hundred seventeen thousand, seven hundred forty-one".