66954894 has 16 divisors (see below), whose sum is σ = 134472960. Its totient is φ = 22224440.

The previous prime is 66954887. The next prime is 66954919. The reversal of 66954894 is 49845966.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21912 + ... + 24779.

It is an arithmetic number, because the mean of its divisors is an integer number (8404560).

Almost surely, 2^66954894 is an apocalyptic number.

66954894 is an abundant number, since it is smaller than the sum of its proper divisors (67518066).

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

66954894 is a wasteful number, since it uses less digits than its factorization.

66954894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46935.

The product of its digits is 1866240, while the sum is 51.

The square root of 66954894 is about 8182.5970205064. The cubic root of 66954894 is about 406.0636452109.

The spelling of 66954894 in words is "sixty-six million, nine hundred fifty-four thousand, eight hundred ninety-four".