54566640 has 60 divisors (see below), whose sum is σ = 183255384. Its totient is φ = 14550912.

The previous prime is 54566597. The next prime is 54566641. The reversal of 54566640 is 4666545.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 54566595 and 54566604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54566641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37174 + ... + 38613.

Almost surely, 2^54566640 is an apocalyptic number.

It is an amenable number.

54566640 is an abundant number, since it is smaller than the sum of its proper divisors (128688744).

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

54566640 is a wasteful number, since it uses less digits than its factorization.

54566640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75806 (or 75797 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The square root of 54566640 is about 7386.9235815730. The cubic root of 54566640 is about 379.2937945624.

The spelling of 54566640 in words is "fifty-four million, five hundred sixty-six thousand, six hundred forty".