126661003020 has 96 divisors (see below), whose sum is σ = 414796300800. Its totient is φ = 31998566592.

The previous prime is 126661002983. The next prime is 126661003081. The reversal of 126661003020 is 20300166621.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6162304 + ... + 6182823.

It is an arithmetic number, because the mean of its divisors is an integer number (4320794800).

Almost surely, 2^126661003020 is an apocalyptic number.

126661003020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

126661003020 is an abundant number, since it is smaller than the sum of its proper divisors (288135297780).

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

126661003020 is a wasteful number, since it uses less digits than its factorization.

126661003020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12345164 (or 12345156 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

Adding to 126661003020 its reverse (20300166621), we get a palindrome (146961169641).

The spelling of 126661003020 in words is "one hundred twenty-six billion, six hundred sixty-one million, three thousand, twenty".