66600077 has 8 divisors (see below), whose sum is σ = 69169056. Its totient is φ = 64077552.

The previous prime is 66600071. The next prime is 66600097. The reversal of 66600077 is 77000666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66600077 - 2¹² = 66595981 is a prime.

It is a Duffinian number.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66600071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8678 + ... + 14439.

It is an arithmetic number, because the mean of its divisors is an integer number (8646132).

Almost surely, 2^66600077 is an apocalyptic number.

66600077 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

It is an amenable number.

66600077 is a deficient number, since it is larger than the sum of its proper divisors (2568979).

66600077 is a wasteful number, since it uses less digits than its factorization.

66600077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23227.

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 66600077 is about 8160.8870228671. The cubic root of 66600077 is about 405.3450841294.

The spelling of 66600077 in words is "sixty-six million, six hundred thousand, seventy-seven".