16667980 has 24 divisors (see below), whose sum is σ = 40003488. Its totient is φ = 5714688.

The previous prime is 16667971. The next prime is 16667983. The reversal of 16667980 is 8976661.

It is not an unprimeable number, because it can be changed into a prime (16667983) 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, 59389 + ... + 59668.

It is an arithmetic number, because the mean of its divisors is an integer number (1666812).

Almost surely, 2^16667980 is an apocalyptic number.

16667980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16667980 is an abundant number, since it is smaller than the sum of its proper divisors (23335508).

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

16667980 is a wasteful number, since it uses less digits than its factorization.

16667980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119073 (or 119071 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 16667980 is about 4082.6437512965. The cubic root of 16667980 is about 255.4431867531.

The spelling of 16667980 in words is "sixteen million, six hundred sixty-seven thousand, nine hundred eighty".