66423401 has 8 divisors (see below), whose sum is σ = 73128000. Its totient is φ = 59829840.

The previous prime is 66423397. The next prime is 66423463. The reversal of 66423401 is 10432466.

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

It is a cyclic number.

It is not a de Polignac number, because 66423401 - 2² = 66423397 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66423481) 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, 26501 + ... + 28898.

It is an arithmetic number, because the mean of its divisors is an integer number (9141000).

Almost surely, 2^66423401 is an apocalyptic number.

It is an amenable number.

66423401 is a deficient number, since it is larger than the sum of its proper divisors (6704599).

66423401 is a wasteful number, since it uses less digits than its factorization.

66423401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55519.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 66423401 is about 8150.0552758862. The cubic root of 66423401 is about 404.9863349553.

Adding to 66423401 its reverse (10432466), we get a palindrome (76855867).

The spelling of 66423401 in words is "sixty-six million, four hundred twenty-three thousand, four hundred one".