126011661 has 8 divisors (see below), whose sum is σ = 168277824. Its totient is φ = 83876640.

The previous prime is 126011647. The next prime is 126011663. The reversal of 126011661 is 166110621.

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

It is not a de Polignac number, because 126011661 - 2⁷ = 126011533 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126011663) 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, 30520 + ... + 34401.

It is an arithmetic number, because the mean of its divisors is an integer number (21034728).

Almost surely, 2^126011661 is an apocalyptic number.

It is an amenable number.

126011661 is a deficient number, since it is larger than the sum of its proper divisors (42266163).

126011661 is an equidigital number, since it uses as much as digits as its factorization.

126011661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65571.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 126011661 is about 11225.4915705282. The cubic root of 126011661 is about 501.3452586456.

It can be divided in two parts, 1260 and 11661, that added together give a palindrome (12921).

The spelling of 126011661 in words is "one hundred twenty-six million, eleven thousand, six hundred sixty-one".