66541029 has 4 divisors (see below), whose sum is σ = 88721376. Its totient is φ = 44360684.

The previous prime is 66541003. The next prime is 66541031. The reversal of 66541029 is 92014566.

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.

It is a cyclic number.

It is not a de Polignac number, because 66541029 - 2⁵ = 66540997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66541039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11090169 + ... + 11090174.

It is an arithmetic number, because the mean of its divisors is an integer number (22180344).

Almost surely, 2^66541029 is an apocalyptic number.

It is an amenable number.

66541029 is a deficient number, since it is larger than the sum of its proper divisors (22180347).

66541029 is a wasteful number, since it uses less digits than its factorization.

66541029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22180346.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 66541029 is about 8157.2684766409. The cubic root of 66541029 is about 405.2252549707.

The spelling of 66541029 in words is "sixty-six million, five hundred forty-one thousand, twenty-nine".