66354123 has 16 divisors (see below), whose sum is σ = 96834816. Its totient is φ = 40081440.

The previous prime is 66354107. The next prime is 66354139. The reversal of 66354123 is 32145366.

It is an interprime number because it is at equal distance from previous prime (66354107) and next prime (66354139).

It is not a de Polignac number, because 66354123 - 2⁴ = 66354107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66354163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7290 + ... + 13632.

It is an arithmetic number, because the mean of its divisors is an integer number (6052176).

Almost surely, 2^66354123 is an apocalyptic number.

66354123 is a deficient number, since it is larger than the sum of its proper divisors (30480693).

66354123 is a wasteful number, since it uses less digits than its factorization.

66354123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6674.

The product of its digits is 12960, while the sum is 30.

The square root of 66354123 is about 8145.8040118824. The cubic root of 66354123 is about 404.8454889950.

Adding to 66354123 its reverse (32145366), we get a palindrome (98499489).

The spelling of 66354123 in words is "sixty-six million, three hundred fifty-four thousand, one hundred twenty-three".