66615041 has 8 divisors (see below), whose sum is σ = 68871264. Its totient is φ = 64391040.

The previous prime is 66615013. The next prime is 66615047. The reversal of 66615041 is 14051666.

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 66615041 - 2¹⁴ = 66598657 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66614995 and 66615013.

It is not an unprimeable number, because it can be changed into a prime (66615047) 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, 3815 + ... + 12156.

It is an arithmetic number, because the mean of its divisors is an integer number (8608908).

Almost surely, 2^66615041 is an apocalyptic number.

It is an amenable number.

66615041 is a deficient number, since it is larger than the sum of its proper divisors (2256223).

66615041 is a wasteful number, since it uses less digits than its factorization.

66615041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16111.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 66615041 is about 8161.8037834783. The cubic root of 66615041 is about 405.3754400984.

The spelling of 66615041 in words is "sixty-six million, six hundred fifteen thousand, forty-one".