126161661 has 8 divisors (see below), whose sum is σ = 173641984. Its totient is φ = 81394560.

The previous prime is 126161639. The next prime is 126161663. The reversal of 126161661 is 166161621.

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

It is not a de Polignac number, because 126161661 - 2¹⁰ = 126160637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126161663) 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, 678196 + ... + 678381.

It is an arithmetic number, because the mean of its divisors is an integer number (21705248).

Almost surely, 2^126161661 is an apocalyptic number.

It is an amenable number.

126161661 is a deficient number, since it is larger than the sum of its proper divisors (47480323).

126161661 is a wasteful number, since it uses less digits than its factorization.

126161661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1356611.

The product of its digits is 2592, while the sum is 30.

The square root of 126161661 is about 11232.1708053252. The cubic root of 126161661 is about 501.5441078862.

The spelling of 126161661 in words is "one hundred twenty-six million, one hundred sixty-one thousand, six hundred sixty-one".