127666667 has 4 divisors (see below), whose sum is σ = 127880400. Its totient is φ = 127452936.

The previous prime is 127666663. The next prime is 127666697. The reversal of 127666667 is 766666721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 766666721 = 20981 ⋅36541.

It is a cyclic number.

It is not a de Polignac number, because 127666667 - 2² = 127666663 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127666663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105968 + ... + 107165.

It is an arithmetic number, because the mean of its divisors is an integer number (31970100).

Almost surely, 2^127666667 is an apocalyptic number.

127666667 is a deficient number, since it is larger than the sum of its proper divisors (213733).

127666667 is an equidigital number, since it uses as much as digits as its factorization.

127666667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213732.

The product of its digits is 762048, while the sum is 47.

The square root of 127666667 is about 11298.9675192028. The cubic root of 127666667 is about 503.5305675085.

The spelling of 127666667 in words is "one hundred twenty-seven million, six hundred sixty-six thousand, six hundred sixty-seven".