55156668 has 48 divisors (see below), whose sum is σ = 153484800. Its totient is φ = 15073344.

The previous prime is 55156667. The next prime is 55156669. The reversal of 55156668 is 86665155.

It is an interprime number because it is at equal distance from previous prime (55156667) and next prime (55156669).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55156667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12343 + ... + 16206.

It is an arithmetic number, because the mean of its divisors is an integer number (3197600).

Almost surely, 2^55156668 is an apocalyptic number.

It is an amenable number.

55156668 is an abundant number, since it is smaller than the sum of its proper divisors (98328132).

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

55156668 is a wasteful number, since it uses less digits than its factorization.

55156668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28586 (or 28584 counting only the distinct ones).

The product of its digits is 216000, while the sum is 42.

The square root of 55156668 is about 7426.7535303119. The cubic root of 55156668 is about 380.6559952488.

The spelling of 55156668 in words is "fifty-five million, one hundred fifty-six thousand, six hundred sixty-eight".