54666640 has 160 divisors (see below), whose sum is σ = 155418624. Its totient is φ = 17487360.

The previous prime is 54666617. The next prime is 54666641. The reversal of 54666640 is 4666645.

It is a self number, because there is not a number n which added to its sum of digits gives 54666640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54666641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 815887 + ... + 815953.

Almost surely, 2^54666640 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 54666640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77709312).

54666640 is an abundant number, since it is smaller than the sum of its proper divisors (100751984).

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

54666640 is a wasteful number, since it uses less digits than its factorization.

54666640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165 (or 159 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 37.

The square root of 54666640 is about 7393.6892009335. The cubic root of 54666640 is about 379.5253538261.

The spelling of 54666640 in words is "fifty-four million, six hundred sixty-six thousand, six hundred forty".