66954404 has 36 divisors (see below), whose sum is σ = 135026640. Its totient is φ = 28730160.

The previous prime is 66954401. The next prime is 66954409. The reversal of 66954404 is 40445966.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is not an unprimeable number, because it can be changed into a prime (66954401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 236447 + ... + 236729.

It is an arithmetic number, because the mean of its divisors is an integer number (3750740).

Almost surely, 2^66954404 is an apocalyptic number.

It is an amenable number.

66954404 is an abundant number, since it is smaller than the sum of its proper divisors (68072236).

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

66954404 is a wasteful number, since it uses less digits than its factorization.

66954404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600 (or 315 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 38.

The square root of 66954404 is about 8182.5670788573. The cubic root of 66954404 is about 406.0626546353.

The spelling of 66954404 in words is "sixty-six million, nine hundred fifty-four thousand, four hundred four".