66651054 has 32 divisors (see below), whose sum is σ = 138184704. Its totient is φ = 21409440.

The previous prime is 66651047. The next prime is 66651071. The reversal of 66651054 is 45015666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53887 + ... + 55109.

It is an arithmetic number, because the mean of its divisors is an integer number (4318272).

Almost surely, 2^66651054 is an apocalyptic number.

66651054 is an abundant number, since it is smaller than the sum of its proper divisors (71533650).

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

66651054 is a wasteful number, since it uses less digits than its factorization.

66651054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1552.

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 66651054 is about 8164.0096766234. The cubic root of 66651054 is about 405.4484774362.

The spelling of 66651054 in words is "sixty-six million, six hundred fifty-one thousand, fifty-four".