66115677 has 8 divisors (see below), whose sum is σ = 88375680. Its totient is φ = 43966400.

The previous prime is 66115663. The next prime is 66115681. The reversal of 66115677 is 77651166.

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 66115677 - 2⁶ = 66115613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66115477) 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, 26277 + ... + 28682.

It is an arithmetic number, because the mean of its divisors is an integer number (11046960).

Almost surely, 2^66115677 is an apocalyptic number.

It is an amenable number.

66115677 is a deficient number, since it is larger than the sum of its proper divisors (22260003).

66115677 is a wasteful number, since it uses less digits than its factorization.

66115677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55363.

The product of its digits is 52920, while the sum is 39.

The square root of 66115677 is about 8131.1547150451. The cubic root of 66115677 is about 404.3599645237.

The spelling of 66115677 in words is "sixty-six million, one hundred fifteen thousand, six hundred seventy-seven".