551601016660 has 48 divisors (see below), whose sum is σ = 1186019182656. Its totient is φ = 215378618112.

The previous prime is 551601016657. The next prime is 551601016663. The reversal of 551601016660 is 66610106155.

It is an interprime number because it is at equal distance from previous prime (551601016657) and next prime (551601016663).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551601016663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1231479 + ... + 1618561.

It is an arithmetic number, because the mean of its divisors is an integer number (24708732972).

Almost surely, 2^551601016660 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 551601016660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (593009591328).

551601016660 is an abundant number, since it is smaller than the sum of its proper divisors (634418165996).

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

551601016660 is a wasteful number, since it uses less digits than its factorization.

551601016660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388792 (or 388790 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 37.

The spelling of 551601016660 in words is "five hundred fifty-one billion, six hundred one million, sixteen thousand, six hundred sixty".