16661260 has 96 divisors (see below), whose sum is σ = 45158400. Its totient is φ = 5011200.

The previous prime is 16661251. The next prime is 16661261. The reversal of 16661260 is 6216661.

16661260 = T₃₈₄ + T₃₈₅ + ... + T₅₃₈.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (16661261) 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, 47566 + ... + 47914.

It is an arithmetic number, because the mean of its divisors is an integer number (470400).

Almost surely, 2^16661260 is an apocalyptic number.

16661260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16661260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22579200).

16661260 is an abundant number, since it is smaller than the sum of its proper divisors (28497140).

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

16661260 is a wasteful number, since it uses less digits than its factorization.

16661260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407 (or 405 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 16661260 is about 4081.8206722001. The cubic root of 16661260 is about 255.4088532794.

It can be divided in two parts, 1666 and 1260, that added together give a triangular number (2926 = T₇₆).

The spelling of 16661260 in words is "sixteen million, six hundred sixty-one thousand, two hundred sixty".