55660220072 has 16 divisors (see below), whose sum is σ = 104400862740. Its totient is φ = 27819990016.

The previous prime is 55660220017. The next prime is 55660220107. The reversal of 55660220072 is 27002206655.

It can be written as a sum of positive squares in 2 ways, for example, as 52264360996 + 3395859076 = 228614^2 + 58274^2 .

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, 1241603 + ... + 1285650.

Almost surely, 2^55660220072 is an apocalyptic number.

It is an amenable number.

55660220072 is a deficient number, since it is larger than the sum of its proper divisors (48740642668).

55660220072 is a wasteful number, since it uses less digits than its factorization.

55660220072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2530012 (or 2530008 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 35.

The spelling of 55660220072 in words is "fifty-five billion, six hundred sixty million, two hundred twenty thousand, seventy-two".