66423011 has 8 divisors (see below), whose sum is σ = 69644544. Its totient is φ = 63229320.

The previous prime is 66423001. The next prime is 66423013. The reversal of 66423011 is 11032466.

It is a happy number.

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 66423011 - 2⁶ = 66422947 is a prime.

It is a super-2 number, since 2×66423011² = 8824032780612242, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66423013) 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, 1991 + ... + 11696.

It is an arithmetic number, because the mean of its divisors is an integer number (8705568).

Almost surely, 2^66423011 is an apocalyptic number.

66423011 is a deficient number, since it is larger than the sum of its proper divisors (3221533).

66423011 is a wasteful number, since it uses less digits than its factorization.

66423011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13921.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 66423011 is about 8150.0313496330. The cubic root of 66423011 is about 404.9855423381.

Adding to 66423011 its reverse (11032466), we get a palindrome (77455477).

The spelling of 66423011 in words is "sixty-six million, four hundred twenty-three thousand, eleven".