666356001 has 16 divisors (see below), whose sum is σ = 894127104. Its totient is φ = 441419904.

The previous prime is 666355981. The next prime is 666356017. The reversal of 666356001 is 100653666.

It is not a de Polignac number, because 666356001 - 2⁹ = 666355489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (666356401) 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, 612480 + ... + 613566.

It is an arithmetic number, because the mean of its divisors is an integer number (55882944).

Almost surely, 2^666356001 is an apocalyptic number.

It is an amenable number.

666356001 is a deficient number, since it is larger than the sum of its proper divisors (227771103).

666356001 is a wasteful number, since it uses less digits than its factorization.

666356001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2200.

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 666356001 is about 25813.8722589231. The cubic root of 666356001 is about 873.4447479241. Note that the first 3 decimals are identical.

The spelling of 666356001 in words is "six hundred sixty-six million, three hundred fifty-six thousand, one".