142666623 has 24 divisors (see below), whose sum is σ = 232324400. Its totient is φ = 86462640.

The previous prime is 142666613. The next prime is 142666637. The reversal of 142666623 is 326666241.

It is not a de Polignac number, because 142666623 - 2⁸ = 142666367 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142666613) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18568 + ... + 25101.

Almost surely, 2^142666623 is an apocalyptic number.

142666623 is a deficient number, since it is larger than the sum of its proper divisors (89657777).

142666623 is a wasteful number, since it uses less digits than its factorization.

142666623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43700 (or 43683 counting only the distinct ones).

The product of its digits is 62208, while the sum is 36.

The square root of 142666623 is about 11944.3134168524. The cubic root of 142666623 is about 522.5254650562.

It can be divided in two parts, 1 and 42666623, that added together give a palindrome (42666624).

The spelling of 142666623 in words is "one hundred forty-two million, six hundred sixty-six thousand, six hundred twenty-three".