55620166517 has 8 divisors (see below), whose sum is σ = 59721406272. Its totient is φ = 51611089600.

The previous prime is 55620166487. The next prime is 55620166523. The reversal of 55620166517 is 71566102655.

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 55620166517 - 2¹⁶ = 55620100981 is a prime.

It is a super-2 number, since 2×55620166517² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55620166577) 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, 23039459 + ... + 23041872.

It is an arithmetic number, because the mean of its divisors is an integer number (7465175784).

Almost surely, 2^55620166517 is an apocalyptic number.

It is an amenable number.

55620166517 is a deficient number, since it is larger than the sum of its proper divisors (4101239755).

55620166517 is a wasteful number, since it uses less digits than its factorization.

55620166517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46081419.

The product of its (nonzero) digits is 378000, while the sum is 44.

The spelling of 55620166517 in words is "fifty-five billion, six hundred twenty million, one hundred sixty-six thousand, five hundred seventeen".