66726108 has 18 divisors (see below), whose sum is σ = 168668864. Its totient is φ = 22242024.

The previous prime is 66726103. The next prime is 66726199. The reversal of 66726108 is 80162766.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1853503 = 66726108 / (6 + 6 + 7 + 2 + 6 + 1 + 0 + 8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66726103) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 926716 + ... + 926787.

Almost surely, 2^66726108 is an apocalyptic number.

It is an amenable number.

66726108 is an abundant number, since it is smaller than the sum of its proper divisors (101942756).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66726108 is a wasteful number, since it uses less digits than its factorization.

66726108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1853513 (or 1853508 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 66726108 is about 8168.6050216668. The cubic root of 66726108 is about 405.6006086379.

The spelling of 66726108 in words is "sixty-six million, seven hundred twenty-six thousand, one hundred eight".