66722379 has 8 divisors (see below), whose sum is σ = 92831232. Its totient is φ = 42547560.

The previous prime is 66722353. The next prime is 66722387. The reversal of 66722379 is 97322766.

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

It is not a de Polignac number, because 66722379 - 2¹² = 66718283 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66722379.

It is not an unprimeable number, because it can be changed into a prime (66722309) 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, 483427 + ... + 483564.

It is an arithmetic number, because the mean of its divisors is an integer number (11603904).

Almost surely, 2^66722379 is an apocalyptic number.

66722379 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

66722379 is a deficient number, since it is larger than the sum of its proper divisors (26108853).

66722379 is a wasteful number, since it uses less digits than its factorization.

66722379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 967017.

The product of its digits is 190512, while the sum is 42.

The square root of 66722379 is about 8168.3767665308. The cubic root of 66722379 is about 405.5930528106.

The spelling of 66722379 in words is "sixty-six million, seven hundred twenty-two thousand, three hundred seventy-nine".