55620066 has 8 divisors (see below), whose sum is σ = 111240144. Its totient is φ = 18540020.

The previous prime is 55620053. The next prime is 55620079. The reversal of 55620066 is 66002655.

It is an interprime number because it is at equal distance from previous prime (55620053) and next prime (55620079).

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

55620066 is an admirable number.

It is a Curzon number.

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, 4635000 + ... + 4635011.

It is an arithmetic number, because the mean of its divisors is an integer number (13905018).

Almost surely, 2^55620066 is an apocalyptic number.

55620066 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

55620066 is a wasteful number, since it uses less digits than its factorization.

55620066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9270016.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 55620066 is about 7457.8861616412. The cubic root of 55620066 is about 381.7190491043.

The spelling of 55620066 in words is "fifty-five million, six hundred twenty thousand, sixty-six".