66061623 has 8 divisors (see below), whose sum is σ = 91119600. Its totient is φ = 42522368.

The previous prime is 66061621. The next prime is 66061637. The reversal of 66061623 is 32616066.

66061623 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 66061623 - 2¹ = 66061621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66061621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 379578 + ... + 379751.

It is an arithmetic number, because the mean of its divisors is an integer number (11389950).

Almost surely, 2^66061623 is an apocalyptic number.

66061623 is a deficient number, since it is larger than the sum of its proper divisors (25057977).

66061623 is a wasteful number, since it uses less digits than its factorization.

66061623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 759361.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 66061623 is about 8127.8301532451. The cubic root of 66061623 is about 404.2497373491.

Adding to 66061623 its reverse (32616066), we get a palindrome (98677689).

The spelling of 66061623 in words is "sixty-six million, sixty-one thousand, six hundred twenty-three".