66442054 has 16 divisors (see below), whose sum is σ = 115769376. Its totient is φ = 28008000.

The previous prime is 66442049. The next prime is 66442073. The reversal of 66442054 is 45024466.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38047 + ... + 39754.

It is an arithmetic number, because the mean of its divisors is an integer number (7235586).

Almost surely, 2^66442054 is an apocalyptic number.

66442054 is a deficient number, since it is larger than the sum of its proper divisors (49327322).

66442054 is a wasteful number, since it uses less digits than its factorization.

66442054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77871.

The product of its (nonzero) digits is 23040, while the sum is 31.

The square root of 66442054 is about 8151.1995436255. The cubic root of 66442054 is about 405.0242407886.

The spelling of 66442054 in words is "sixty-six million, four hundred forty-two thousand, fifty-four".