55669040 has 40 divisors (see below), whose sum is σ = 147922080. Its totient is φ = 19086336.

The previous prime is 55669001. The next prime is 55669043. The reversal of 55669040 is 4096655.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (35).

It is not an unprimeable number, because it can be changed into a prime (55669043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49145 + ... + 50264.

It is an arithmetic number, because the mean of its divisors is an integer number (3698052).

Almost surely, 2^55669040 is an apocalyptic number.

It is an amenable number.

55669040 is an abundant number, since it is smaller than the sum of its proper divisors (92253040).

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

55669040 is a wasteful number, since it uses less digits than its factorization.

55669040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99429 (or 99423 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 55669040 is about 7461.1688092416. The cubic root of 55669040 is about 381.8310519952.

It can be divided in two parts, 556 and 69040, that added together give a palindrome (69596).

The spelling of 55669040 in words is "fifty-five million, six hundred sixty-nine thousand, forty".