1016121660 has 24 divisors (see below), whose sum is σ = 2845140816. Its totient is φ = 270965760.

The previous prime is 1016121643. The next prime is 1016121679. The reversal of 1016121660 is 661216101.

It is a self number, because there is not a number n which added to its sum of digits gives 1016121660.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8467621 + ... + 8467740.

It is an arithmetic number, because the mean of its divisors is an integer number (118547534).

Almost surely, 2^1016121660 is an apocalyptic number.

1016121660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1016121660 is an abundant number, since it is smaller than the sum of its proper divisors (1829019156).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1016121660 is a wasteful number, since it uses less digits than its factorization.

1016121660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16935373 (or 16935371 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 1016121660 is about 31876.6632507231. The cubic root of 1016121660 is about 1005.3452639124.

Adding to 1016121660 its reverse (661216101), we get a palindrome (1677337761).

The spelling of 1016121660 in words is "one billion, sixteen million, one hundred twenty-one thousand, six hundred sixty".