1661516050 has 48 divisors (see below), whose sum is σ = 3126049920. Its totient is φ = 656994240.

The previous prime is 1661516041. The next prime is 1661516069. The reversal of 1661516050 is 506151661.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1947424 + ... + 1948276.

It is an arithmetic number, because the mean of its divisors is an integer number (65126040).

Almost surely, 2^1661516050 is an apocalyptic number.

1661516050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1661516050 is a deficient number, since it is larger than the sum of its proper divisors (1464533870).

1661516050 is a wasteful number, since it uses less digits than its factorization.

1661516050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1267 (or 1262 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 1661516050 is about 40761.6983208502. The cubic root of 1661516050 is about 1184.4084949325.

The spelling of 1661516050 in words is "one billion, six hundred sixty-one million, five hundred sixteen thousand, fifty".