554215236666 has 128 divisors (see below), whose sum is σ = 1393652736000. Its totient is φ = 145999788480.

The previous prime is 554215236643. The next prime is 554215236689. The reversal of 554215236666 is 666632512455.

It is an interprime number because it is at equal distance from previous prime (554215236643) and next prime (554215236689).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 24361525 + ... + 24384263.

It is an arithmetic number, because the mean of its divisors is an integer number (10887912000).

Almost surely, 2^554215236666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 554215236666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (696826368000).

554215236666 is an abundant number, since it is smaller than the sum of its proper divisors (839437499334).

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

554215236666 is a wasteful number, since it uses less digits than its factorization.

554215236666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23689 (or 23675 counting only the distinct ones).

The product of its digits is 7776000, while the sum is 51.

The spelling of 554215236666 in words is "five hundred fifty-four billion, two hundred fifteen million, two hundred thirty-six thousand, six hundred sixty-six".