16661051 has 12 divisors (see below), whose sum is σ = 18834504. Its totient is φ = 14616000.

The previous prime is 16660979. The next prime is 16661083. The reversal of 16661051 is 15016661.

It is a de Polignac number, because none of the positive numbers 2^k-16661051 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 16661051.

It is not an unprimeable number, because it can be changed into a prime (16661251) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8351 + ... + 10151.

It is an arithmetic number, because the mean of its divisors is an integer number (1569542).

Almost surely, 2^16661051 is an apocalyptic number.

16661051 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

16661051 is a deficient number, since it is larger than the sum of its proper divisors (2173453).

16661051 is a wasteful number, since it uses less digits than its factorization.

16661051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1870 (or 1841 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 16661051 is about 4081.7950707991. The cubic root of 16661051 is about 255.4077853195.

It can be divided in two parts, 166610 and 51, that added together give a palindrome (166661).

The spelling of 16661051 in words is "sixteen million, six hundred sixty-one thousand, fifty-one".