506100661 has 4 divisors (see below), whose sum is σ = 552109824. Its totient is φ = 460091500.

The previous prime is 506100641. The next prime is 506100667. The reversal of 506100661 is 166001605.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 506100661 - 2⁵ = 506100629 is a prime.

It is a super-2 number, since 2×506100661² = 512275758129273842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (506100667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23004565 + ... + 23004586.

It is an arithmetic number, because the mean of its divisors is an integer number (138027456).

Almost surely, 2^506100661 is an apocalyptic number.

It is an amenable number.

506100661 is a deficient number, since it is larger than the sum of its proper divisors (46009163).

506100661 is a wasteful number, since it uses less digits than its factorization.

506100661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46009162.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 506100661 is about 22496.6811107772. The cubic root of 506100661 is about 796.9155506029.

The spelling of 506100661 in words is "five hundred six million, one hundred thousand, six hundred sixty-one".