66124045 has 8 divisors (see below), whose sum is σ = 85452696. Its totient is φ = 48830016.

The previous prime is 66124039. The next prime is 66124049. The reversal of 66124045 is 54042166.

It can be written as a sum of positive squares in 4 ways, for example, as 1771561 + 64352484 = 1331^2 + 8022^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66124045 - 2⁵ = 66124013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66124049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 508582 + ... + 508711.

It is an arithmetic number, because the mean of its divisors is an integer number (10681587).

Almost surely, 2^66124045 is an apocalyptic number.

66124045 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

66124045 is a deficient number, since it is larger than the sum of its proper divisors (19328651).

66124045 is a wasteful number, since it uses less digits than its factorization.

66124045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1017311.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 66124045 is about 8131.6692628267. The cubic root of 66124045 is about 404.3770232184.

The spelling of 66124045 in words is "sixty-six million, one hundred twenty-four thousand, forty-five".