55067720 has 16 divisors (see below), whose sum is σ = 123902460. Its totient is φ = 22027072.

The previous prime is 55067717. The next prime is 55067731. The reversal of 55067720 is 2776055.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 52157284 + 2910436 = 7222^2 + 1706^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 688307 + ... + 688386.

Almost surely, 2^55067720 is an apocalyptic number.

It is an amenable number.

55067720 is an abundant number, since it is smaller than the sum of its proper divisors (68834740).

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

55067720 is a wasteful number, since it uses less digits than its factorization.

55067720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1376704 (or 1376700 counting only the distinct ones).

The product of its (nonzero) digits is 14700, while the sum is 32.

The square root of 55067720 is about 7420.7627640290. The cubic root of 55067720 is about 380.4512644482.

The spelling of 55067720 in words is "fifty-five million, sixty-seven thousand, seven hundred twenty".