123666667 has 6 divisors (see below), whose sum is σ = 126611412. Its totient is φ = 120788892.

The previous prime is 123666659. The next prime is 123666677. The reversal of 123666667 is 766666321.

It is not a de Polignac number, because 123666667 - 2³ = 123666659 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (123666637) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 31593 + ... + 35290.

It is an arithmetic number, because the mean of its divisors is an integer number (21101902).

Almost surely, 2^123666667 is an apocalyptic number.

123666667 is a deficient number, since it is larger than the sum of its proper divisors (2944745).

123666667 is an frugal number, since it uses more digits than its factorization.

123666667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66969 (or 66926 counting only the distinct ones).

The product of its digits is 326592, while the sum is 43.

The square root of 123666667 is about 11120.5515600621. The cubic root of 123666667 is about 498.2158639560.

The spelling of 123666667 in words is "one hundred twenty-three million, six hundred sixty-six thousand, six hundred sixty-seven".