2001667572 has 24 divisors (see below), whose sum is σ = 5189508800. Its totient is φ = 667222488.

The previous prime is 2001667543. The next prime is 2001667643. The reversal of 2001667572 is 2757661002.

2001667572 is a `hidden beast` number, since 20 + 0 + 1 + 6 + 67 + 572 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9266872 + ... + 9267087.

Almost surely, 2^2001667572 is an apocalyptic number.

It is an amenable number.

2001667572 is an abundant number, since it is smaller than the sum of its proper divisors (3187841228).

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

2001667572 is a wasteful number, since it uses less digits than its factorization.

2001667572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18533972 (or 18533964 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 2001667572 is about 44739.9996870809. Note that the first 3 decimals coincide. The cubic root of 2001667572 is about 1260.2711207957.

The spelling of 2001667572 in words is "two billion, one million, six hundred sixty-seven thousand, five hundred seventy-two".