66922427 has 16 divisors (see below), whose sum is σ = 82763520. Its totient is φ = 53200800.

The previous prime is 66922409. The next prime is 66922441. The reversal of 66922427 is 72422966.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 66922427 - 2¹⁴ = 66906043 is a prime.

It is a super-2 number, since 2×66922427² = 8957222471140658, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66922487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9599 + ... + 15032.

It is an arithmetic number, because the mean of its divisors is an integer number (5172720).

Almost surely, 2^66922427 is an apocalyptic number.

66922427 is a deficient number, since it is larger than the sum of its proper divisors (15841093).

66922427 is a wasteful number, since it uses less digits than its factorization.

66922427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24674.

The product of its digits is 72576, while the sum is 38.

The square root of 66922427 is about 8180.6128743512. The cubic root of 66922427 is about 405.9980000225.

It can be divided in two parts, 6692 and 2427, that added together give a palindrome (9119).

The spelling of 66922427 in words is "sixty-six million, nine hundred twenty-two thousand, four hundred twenty-seven".