120666001 has 8 divisors (see below), whose sum is σ = 123123240. Its totient is φ = 118215552.

The previous prime is 120665989. The next prime is 120666019. The reversal of 120666001 is 100666021.

120666001 = 1014² + 1015² + ... + 1119².

It can be written as a sum of positive squares in 4 ways, for example, as 12006225 + 108659776 = 3465^2 + 10424^2 .

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 120666001 - 2¹¹ = 120663953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (120696001) 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, 49315 + ... + 51703.

It is an arithmetic number, because the mean of its divisors is an integer number (15390405).

Almost surely, 2^120666001 is an apocalyptic number.

It is an amenable number.

120666001 is a deficient number, since it is larger than the sum of its proper divisors (2457239).

120666001 is an equidigital number, since it uses as much as digits as its factorization.

120666001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3395.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 120666001 is about 10984.8077361418. The cubic root of 120666001 is about 494.1532317624.

The spelling of 120666001 in words is "one hundred twenty million, six hundred sixty-six thousand, one".