123642066 has 16 divisors (see below), whose sum is σ = 258035904. Its totient is φ = 39422064.

The previous prime is 123642041. The next prime is 123642067. The reversal of 123642066 is 660246321.

It is not an unprimeable number, because it can be changed into a prime (123642067) 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, 447841 + ... + 448116.

It is an arithmetic number, because the mean of its divisors is an integer number (16127244).

Almost surely, 2^123642066 is an apocalyptic number.

123642066 is an abundant number, since it is smaller than the sum of its proper divisors (134393838).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123642066 is a wasteful number, since it uses less digits than its factorization.

123642066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 895985.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 123642066 is about 11119.4453998390. The cubic root of 123642066 is about 498.1828250847.

Adding to 123642066 its reverse (660246321), we get a palindrome (783888387).

The spelling of 123642066 in words is "one hundred twenty-three million, six hundred forty-two thousand, sixty-six".