806999551 has 12 divisors (see below), whose sum is σ = 852363232. Its totient is φ = 763906176.

The previous prime is 806999539. The next prime is 806999573. The reversal of 806999551 is 155999608.

It is not a de Polignac number, because 806999551 - 2⁵ = 806999519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (806999591) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43450 + ... + 59176.

Almost surely, 2^806999551 is an apocalyptic number.

806999551 is a deficient number, since it is larger than the sum of its proper divisors (45363681).

806999551 is a wasteful number, since it uses less digits than its factorization.

806999551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15870 (or 15847 counting only the distinct ones).

The product of its (nonzero) digits is 874800, while the sum is 52.

The square root of 806999551 is about 28407.7375199082. The cubic root of 806999551 is about 931.0173285605.

The spelling of 806999551 in words is "eight hundred six million, nine hundred ninety-nine thousand, five hundred fifty-one".