66671023 has 8 divisors (see below), whose sum is σ = 67680000. Its totient is φ = 65666328.

The previous prime is 66671021. The next prime is 66671039. The reversal of 66671023 is 32017666.

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 66671023 - 2¹ = 66671021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66671021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43728 + ... + 45226.

It is an arithmetic number, because the mean of its divisors is an integer number (8460000).

Almost surely, 2^66671023 is an apocalyptic number.

66671023 is a deficient number, since it is larger than the sum of its proper divisors (1008977).

66671023 is a wasteful number, since it uses less digits than its factorization.

66671023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2141.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 66671023 is about 8165.2325747648. The cubic root of 66671023 is about 405.4889648790.

Adding to 66671023 its reverse (32017666), we get a palindrome (98688689).

The spelling of 66671023 in words is "sixty-six million, six hundred seventy-one thousand, twenty-three".