55660139 has 8 divisors (see below), whose sum is σ = 58659840. Its totient is φ = 52667496.

The previous prime is 55660133. The next prime is 55660141. The reversal of 55660139 is 93106655.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55660139 - 2¹² = 55656043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55660099 and 55660108.

It is not an unprimeable number, because it can be changed into a prime (55660133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24902 + ... + 27044.

It is an arithmetic number, because the mean of its divisors is an integer number (7332480).

Almost surely, 2^55660139 is an apocalyptic number.

55660139 is a deficient number, since it is larger than the sum of its proper divisors (2999701).

55660139 is a wasteful number, since it uses less digits than its factorization.

55660139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3529.

The product of its (nonzero) digits is 24300, while the sum is 35.

The square root of 55660139 is about 7460.5722970828. The cubic root of 55660139 is about 381.8107004117.

The spelling of 55660139 in words is "fifty-five million, six hundred sixty thousand, one hundred thirty-nine".