666100461 has 16 divisors (see below), whose sum is σ = 1006792640. Its totient is φ = 388333440.

The previous prime is 666100433. The next prime is 666100469. The reversal of 666100461 is 164001666.

It is not a de Polignac number, because 666100461 - 2⁶ = 666100397 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 (666100469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 448720 + ... + 450201.

It is an arithmetic number, because the mean of its divisors is an integer number (62924540).

Almost surely, 2^666100461 is an apocalyptic number.

It is an amenable number.

666100461 is a deficient number, since it is larger than the sum of its proper divisors (340692179).

666100461 is a wasteful number, since it uses less digits than its factorization.

666100461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 898956.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 666100461 is about 25808.9221200731. The cubic root of 666100461 is about 873.3330815835. Note that the first 3 decimals are identical.

The spelling of 666100461 in words is "six hundred sixty-six million, one hundred thousand, four hundred sixty-one".