1016661165 has 32 divisors (see below), whose sum is σ = 1755323136. Its totient is φ = 499499520.

The previous prime is 1016661143. The next prime is 1016661167. The reversal of 1016661165 is 5611666101.

It is not a de Polignac number, because 1016661165 - 2¹¹ = 1016659117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1016661167) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 96592 + ... + 106598.

It is an arithmetic number, because the mean of its divisors is an integer number (54853848).

Almost surely, 2^1016661165 is an apocalyptic number.

1016661165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1016661165 is a deficient number, since it is larger than the sum of its proper divisors (738661971).

1016661165 is a wasteful number, since it uses less digits than its factorization.

1016661165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10549.

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 1016661165 is about 31885.1245097146. The cubic root of 1016661165 is about 1005.5231602061.

It can be divided in two parts, 101666 and 1165, that added together give a triangular number (102831 = T₄₅₃).

The spelling of 1016661165 in words is "one billion, sixteen million, six hundred sixty-one thousand, one hundred sixty-five".