66922601 has 4 divisors (see below), whose sum is σ = 66939012. Its totient is φ = 66906192.

The previous prime is 66922589. The next prime is 66922613. The reversal of 66922601 is 10622966.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (66922589) and next prime (66922613).

It can be written as a sum of positive squares in 2 ways, for example, as 66846976 + 75625 = 8176^2 + 275^2 .

It is a cyclic number.

It is not a de Polignac number, because 66922601 - 2¹⁰ = 66921577 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66922001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3155 + ... + 11991.

It is an arithmetic number, because the mean of its divisors is an integer number (16734753).

Almost surely, 2^66922601 is an apocalyptic number.

It is an amenable number.

66922601 is a deficient number, since it is larger than the sum of its proper divisors (16411).

66922601 is an equidigital number, since it uses as much as digits as its factorization.

66922601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16410.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 66922601 is about 8180.6235092443. The cubic root of 66922601 is about 405.9983518905.

The spelling of 66922601 in words is "sixty-six million, nine hundred twenty-two thousand, six hundred one".