1666670016 has 112 divisors (see below), whose sum is σ = 4822179840. Its totient is φ = 503838720.

The previous prime is 1666670003. The next prime is 1666670023. The reversal of 1666670016 is 6100766661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1302465 + ... + 1303743.

Almost surely, 2^1666670016 is an apocalyptic number.

1666670016 is a gapful number since it is divisible by the number (16) 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 1666670016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2411089920).

1666670016 is an abundant number, since it is smaller than the sum of its proper divisors (3155509824).

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

1666670016 is a wasteful number, since it uses less digits than its factorization.

1666670016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1922 (or 1912 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 1666670016 is about 40824.8700671539. The cubic root of 1666670016 is about 1185.6318957109.

The spelling of 1666670016 in words is "one billion, six hundred sixty-six million, six hundred seventy thousand, sixteen".