2006864658 has 18 divisors (see below), whose sum is σ = 4348618599. Its totient is φ = 668891532.

The previous prime is 2006864633. The next prime is 2006864687. The reversal of 2006864658 is 8564686002.

It can be written as a sum of positive squares in only one way, i.e., 1003432329 + 1003432329 = 31677^2 + 31677^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=31677.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 184783 + ... + 195341.

Almost surely, 2^2006864658 is an apocalyptic number.

2006864658 is an abundant number, since it is smaller than the sum of its proper divisors (2341753941).

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

2006864658 is an frugal number, since it uses more digits than its factorization.

2006864658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21126 (or 10564 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The square root of 2006864658 is about 44798.0430152925. The cubic root of 2006864658 is about 1261.3608916647.

The spelling of 2006864658 in words is "two billion, six million, eight hundred sixty-four thousand, six hundred fifty-eight".