550100661 has 16 divisors (see below), whose sum is σ = 800539200. Its totient is φ = 333230720.

The previous prime is 550100657. The next prime is 550100669. The reversal of 550100661 is 166001055.

It is a cyclic number.

It is not a de Polignac number, because 550100661 - 2² = 550100657 is a prime.

It is a super-2 number, since 2×550100661² = 605221474465273842, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550100669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124315 + ... + 128663.

It is an arithmetic number, because the mean of its divisors is an integer number (50033700).

Almost surely, 2^550100661 is an apocalyptic number.

It is an amenable number.

550100661 is a deficient number, since it is larger than the sum of its proper divisors (250438539).

550100661 is a wasteful number, since it uses less digits than its factorization.

550100661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8196.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 550100661 is about 23454.2248006622. The cubic root of 550100661 is about 819.3712516112.

The spelling of 550100661 in words is "five hundred fifty million, one hundred thousand, six hundred sixty-one".