1016665061 has 4 divisors (see below), whose sum is σ = 1017244800. Its totient is φ = 1016085324.

The previous prime is 1016664989. The next prime is 1016665073. The reversal of 1016665061 is 1605666101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1605666101 = 13 ⋅123512777.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1016665061 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 (1016665361) 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, 287231 + ... + 290748.

It is an arithmetic number, because the mean of its divisors is an integer number (254311200).

Almost surely, 2^1016665061 is an apocalyptic number.

It is an amenable number.

1016665061 is a deficient number, since it is larger than the sum of its proper divisors (579739).

1016665061 is an equidigital number, since it uses as much as digits as its factorization.

1016665061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579738.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 1016665061 is about 31885.1856039760. The cubic root of 1016665061 is about 1005.5244446436.

The spelling of 1016665061 in words is "one billion, sixteen million, six hundred sixty-five thousand, sixty-one".