1006687221 has 8 divisors (see below), whose sum is σ = 1342724544. Its totient is φ = 670887360.

The previous prime is 1006687193. The next prime is 1006687259. The reversal of 1006687221 is 1227866001.

1006687221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1006687221 - 2⁷ = 1006687093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1006682221) 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, 49225 + ... + 66606.

It is an arithmetic number, because the mean of its divisors is an integer number (167840568).

Almost surely, 2^1006687221 is an apocalyptic number.

It is an amenable number.

1006687221 is a deficient number, since it is larger than the sum of its proper divisors (336037323).

1006687221 is a wasteful number, since it uses less digits than its factorization.

1006687221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118731.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 1006687221 is about 31728.3346710791. The cubic root of 1006687221 is about 1002.2241232749.

The spelling of 1006687221 in words is "one billion, six million, six hundred eighty-seven thousand, two hundred twenty-one".