666292601 has 8 divisors (see below), whose sum is σ = 717777480. Its totient is φ = 614840832.

The previous prime is 666292573. The next prime is 666292607. The reversal of 666292601 is 106292666.

It can be written as a sum of positive squares in 4 ways, for example, as 9703225 + 656589376 = 3115^2 + 25624^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 666292601 - 2²⁶ = 599183737 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (666292607) 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, 47471 + ... + 59883.

It is an arithmetic number, because the mean of its divisors is an integer number (89722185).

Almost surely, 2^666292601 is an apocalyptic number.

It is an amenable number.

666292601 is a deficient number, since it is larger than the sum of its proper divisors (51484879).

666292601 is a wasteful number, since it uses less digits than its factorization.

666292601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16555.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 666292601 is about 25812.6442078296. The cubic root of 666292601 is about 873.4170459383.

The spelling of 666292601 in words is "six hundred sixty-six million, two hundred ninety-two thousand, six hundred one".