66761204 has 6 divisors (see below), whose sum is σ = 116832114. Its totient is φ = 33380600.

The previous prime is 66761183. The next prime is 66761221. The reversal of 66761204 is 40216766.

It can be written as a sum of positive squares in only one way, i.e., 54789604 + 11971600 = 7402^2 + 3460^2 .

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 as a sum of consecutive naturals, namely, 8345147 + ... + 8345154.

It is an arithmetic number, because the mean of its divisors is an integer number (19472019).

Almost surely, 2^66761204 is an apocalyptic number.

It is an amenable number.

66761204 is a deficient number, since it is larger than the sum of its proper divisors (50070910).

66761204 is a wasteful number, since it uses less digits than its factorization.

66761204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16690305 (or 16690303 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 66761204 is about 8170.7529640786. The cubic root of 66761204 is about 405.6717075645.

The spelling of 66761204 in words is "sixty-six million, seven hundred sixty-one thousand, two hundred four".