551666740 has 12 divisors (see below), whose sum is σ = 1158500196. Its totient is φ = 220666688.

The previous prime is 551666617. The next prime is 551666741. The reversal of 551666740 is 47666155.

It can be written as a sum of positive squares in 2 ways, for example, as 128459556 + 423207184 = 11334^2 + 20572^2 .

It is a junction number, because it is equal to n+sod(n) for n = 551666693 and 551666702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551666741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13791649 + ... + 13791688.

It is an arithmetic number, because the mean of its divisors is an integer number (96541683).

Almost surely, 2^551666740 is an apocalyptic number.

It is an amenable number.

551666740 is an abundant number, since it is smaller than the sum of its proper divisors (606833456).

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

551666740 is a wasteful number, since it uses less digits than its factorization.

551666740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27583346 (or 27583344 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 40.

The square root of 551666740 is about 23487.5869343788. The cubic root of 551666740 is about 820.1480696323.

The spelling of 551666740 in words is "five hundred fifty-one million, six hundred sixty-six thousand, seven hundred forty".