551666136 has 32 divisors (see below), whose sum is σ = 1576189440. Its totient is φ = 157618848.

The previous prime is 551666131. The next prime is 551666147. The reversal of 551666136 is 631666155.

It is a junction number, because it is equal to n+sod(n) for n = 551666094 and 551666103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551666131) 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, 1641696 + ... + 1642031.

It is an arithmetic number, because the mean of its divisors is an integer number (49255920).

Almost surely, 2^551666136 is an apocalyptic number.

551666136 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

551666136 is an abundant number, since it is smaller than the sum of its proper divisors (1024523304).

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

551666136 is a wasteful number, since it uses less digits than its factorization.

551666136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3283743 (or 3283739 counting only the distinct ones).

The product of its digits is 97200, while the sum is 39.

The square root of 551666136 is about 23487.5740765197. The cubic root of 551666136 is about 820.1477703153.

The spelling of 551666136 in words is "five hundred fifty-one million, six hundred sixty-six thousand, one hundred thirty-six".