66737541 has 16 divisors (see below), whose sum is σ = 97045760. Its totient is φ = 40547520.

The previous prime is 66737527. The next prime is 66737543. The reversal of 66737541 is 14573766.

It is not a de Polignac number, because 66737541 - 2⁹ = 66737029 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66737541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66737543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7750 + ... + 13911.

It is an arithmetic number, because the mean of its divisors is an integer number (6065360).

Almost surely, 2^66737541 is an apocalyptic number.

It is an amenable number.

66737541 is a deficient number, since it is larger than the sum of its proper divisors (30308219).

66737541 is a wasteful number, since it uses less digits than its factorization.

66737541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21756.

The product of its digits is 105840, while the sum is 39.

The square root of 66737541 is about 8169.3048051839. The cubic root of 66737541 is about 405.6237728189.

The spelling of 66737541 in words is "sixty-six million, seven hundred thirty-seven thousand, five hundred forty-one".