126639663 has 8 divisors (see below), whose sum is σ = 168905088. Its totient is φ = 84400344.

The previous prime is 126639661. The next prime is 126639671. The reversal of 126639663 is 366936621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 126639663 - 2¹ = 126639661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126639661) 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, 14206 + ... + 21332.

It is an arithmetic number, because the mean of its divisors is an integer number (21113136).

Almost surely, 2^126639663 is an apocalyptic number.

126639663 is a deficient number, since it is larger than the sum of its proper divisors (42265425).

126639663 is an equidigital number, since it uses as much as digits as its factorization.

126639663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13053.

The product of its digits is 209952, while the sum is 42.

The square root of 126639663 is about 11253.4289441041. The cubic root of 126639663 is about 502.1767272983.

The spelling of 126639663 in words is "one hundred twenty-six million, six hundred thirty-nine thousand, six hundred sixty-three".