16662740 has 24 divisors (see below), whose sum is σ = 35147112. Its totient is φ = 6635520.

The previous prime is 16662739. The next prime is 16662743. The reversal of 16662740 is 4726661.

16662740 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 244036 + 16418704 = 494^2 + 4052^2 .

It is a junction number, because it is equal to n+sod(n) for n = 16662697 and 16662706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16662743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3092 + ... + 6548.

It is an arithmetic number, because the mean of its divisors is an integer number (1464463).

Almost surely, 2^16662740 is an apocalyptic number.

16662740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16662740 is an abundant number, since it is smaller than the sum of its proper divisors (18484372).

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

16662740 is a wasteful number, since it uses less digits than its factorization.

16662740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3707 (or 3705 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 16662740 is about 4082.0019598231. The cubic root of 16662740 is about 255.4164156109.

The spelling of 16662740 in words is "sixteen million, six hundred sixty-two thousand, seven hundred forty".