66555414 has 24 divisors (see below), whose sum is σ = 146181672. Its totient is φ = 21880800.

The previous prime is 66555409. The next prime is 66555427. The reversal of 66555414 is 41455566.

66555414 is a `hidden beast` number, since 66 + 55 + 541 + 4 = 666.

It is a super-2 number, since 2×66555414² = 8859246265422792, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24012 + ... + 26639.

It is an arithmetic number, because the mean of its divisors is an integer number (6090903).

Almost surely, 2^66555414 is an apocalyptic number.

66555414 is an abundant number, since it is smaller than the sum of its proper divisors (79626258).

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

66555414 is a wasteful number, since it uses less digits than its factorization.

66555414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50732 (or 50729 counting only the distinct ones).

The product of its digits is 72000, while the sum is 36.

The square root of 66555414 is about 8158.1501579709. The cubic root of 66555414 is about 405.2544537241.

The spelling of 66555414 in words is "sixty-six million, five hundred fifty-five thousand, four hundred fourteen".