55402166 has 12 divisors (see below), whose sum is σ = 84474972. Its totient is φ = 27245196.

The previous prime is 55402163. The next prime is 55402169. The reversal of 55402166 is 66120455.

It is an interprime number because it is at equal distance from previous prime (55402163) and next prime (55402169).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55402163) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 85841 + ... + 86483.

It is an arithmetic number, because the mean of its divisors is an integer number (7039581).

Almost surely, 2^55402166 is an apocalyptic number.

55402166 is a deficient number, since it is larger than the sum of its proper divisors (29072806).

55402166 is an frugal number, since it uses more digits than its factorization.

55402166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1355 (or 712 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 55402166 is about 7443.2631284941. The cubic root of 55402166 is about 381.2199160710.

The spelling of 55402166 in words is "fifty-five million, four hundred two thousand, one hundred sixty-six".