66722359 has 16 divisors (see below), whose sum is σ = 77346720. Its totient is φ = 56972160.

The previous prime is 66722353. The next prime is 66722387. The reversal of 66722359 is 95322766.

It is a cyclic number.

It is not a de Polignac number, because 66722359 - 2³ = 66722351 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66722351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8977 + ... + 14629.

It is an arithmetic number, because the mean of its divisors is an integer number (4834170).

Almost surely, 2^66722359 is an apocalyptic number.

66722359 is a deficient number, since it is larger than the sum of its proper divisors (10624361).

66722359 is a wasteful number, since it uses less digits than its factorization.

66722359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5730.

The product of its digits is 136080, while the sum is 40.

The square root of 66722359 is about 8168.3755422973. The cubic root of 66722359 is about 405.5930122852.

It can be divided in two parts, 66722 and 359, that added together give a square (67081 = 259²).

The spelling of 66722359 in words is "sixty-six million, seven hundred twenty-two thousand, three hundred fifty-nine".