66523677 has 8 divisors (see below), whose sum is σ = 96761760. Its totient is φ = 40317360.

The previous prime is 66523657. The next prime is 66523687. The reversal of 66523677 is 77632566.

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

It is not a de Polignac number, because 66523677 - 2¹⁴ = 66507293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66523627) 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, 1007902 + ... + 1007967.

It is an arithmetic number, because the mean of its divisors is an integer number (12095220).

Almost surely, 2^66523677 is an apocalyptic number.

It is an amenable number.

66523677 is a deficient number, since it is larger than the sum of its proper divisors (30238083).

66523677 is a wasteful number, since it uses less digits than its factorization.

66523677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2015883.

The product of its digits is 317520, while the sum is 42.

The square root of 66523677 is about 8156.2048159668. The cubic root of 66523677 is about 405.1900281840.

Subtracting 66523677 from its reverse (77632566), we obtain a square (11108889 = 3333²).

It can be divided in two parts, 665 and 23677, that added together give a palindrome (24342).

The spelling of 66523677 in words is "sixty-six million, five hundred twenty-three thousand, six hundred seventy-seven".