127666540 has 24 divisors (see below), whose sum is σ = 269588592. Its totient is φ = 50783040.

The previous prime is 127666519. The next prime is 127666547. The reversal of 127666540 is 45666721.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 127666540.

It is not an unprimeable number, because it can be changed into a prime (127666547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14014 + ... + 21253.

It is an arithmetic number, because the mean of its divisors is an integer number (11232858).

Almost surely, 2^127666540 is an apocalyptic number.

127666540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

127666540 is an abundant number, since it is smaller than the sum of its proper divisors (141922052).

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

127666540 is a wasteful number, since it uses less digits than its factorization.

127666540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35457 (or 35455 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 127666540 is about 11298.9618992189. The cubic root of 127666540 is about 503.5304005414.

It can be divided in two parts, 12766 and 6540, that added together give a triangular number (19306 = T₁₉₆).

The spelling of 127666540 in words is "one hundred twenty-seven million, six hundred sixty-six thousand, five hundred forty".