1016665201 has 4 divisors (see below), whose sum is σ = 1016874612. Its totient is φ = 1016455792.

The previous prime is 1016665183. The next prime is 1016665213. The reversal of 1016665201 is 1025666101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1025666101 = 47 ⋅21822683.

It can be written as a sum of positive squares in 2 ways, for example, as 520934976 + 495730225 = 22824^2 + 22265^2 .

It is a cyclic number.

It is not a de Polignac number, because 1016665201 - 2⁷ = 1016665073 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1016665201.

It is not an unprimeable number, because it can be changed into a prime (1016665291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97246 + ... + 107191.

It is an arithmetic number, because the mean of its divisors is an integer number (254218653).

Almost surely, 2^1016665201 is an apocalyptic number.

It is an amenable number.

1016665201 is a deficient number, since it is larger than the sum of its proper divisors (209411).

1016665201 is an equidigital number, since it uses as much as digits as its factorization.

1016665201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209410.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 1016665201 is about 31885.1877993529. The cubic root of 1016665201 is about 1005.5244907989.

The spelling of 1016665201 in words is "one billion, sixteen million, six hundred sixty-five thousand, two hundred one".