4206512661 has 16 divisors (see below), whose sum is σ = 6052550784. Its totient is φ = 2583296064.

The previous prime is 4206512641. The next prime is 4206512663. The reversal of 4206512661 is 1662156024.

It is not a de Polignac number, because 4206512661 - 2²² = 4202318357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4206512663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91746 + ... + 129731.

It is an arithmetic number, because the mean of its divisors is an integer number (378284424).

Almost surely, 2^4206512661 is an apocalyptic number.

It is an amenable number.

4206512661 is a deficient number, since it is larger than the sum of its proper divisors (1846038123).

4206512661 is a wasteful number, since it uses less digits than its factorization.

4206512661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221980.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 4206512661 is about 64857.6337912508. The cubic root of 4206512661 is about 1614.2621608887.

Adding to 4206512661 its reverse (1662156024), we get a palindrome (5868668685).

The spelling of 4206512661 in words is "four billion, two hundred six million, five hundred twelve thousand, six hundred sixty-one".