66770780735 has 8 divisors (see below), whose sum is σ = 82887865920. Its totient is φ = 51574671904.

The previous prime is 66770780693. The next prime is 66770780749. The reversal of 66770780735 is 53708707766.

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 66770780735 - 2¹⁴ = 66770764351 is a prime.

It is a super-2 number, since 2×66770780735² (a number of 22 digits) contains 22 as substring.

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, 230243927 + ... + 230244216.

It is an arithmetic number, because the mean of its divisors is an integer number (10360983240).

Almost surely, 2^66770780735 is an apocalyptic number.

66770780735 is a deficient number, since it is larger than the sum of its proper divisors (16117085185).

66770780735 is a wasteful number, since it uses less digits than its factorization.

66770780735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460488177.

The product of its (nonzero) digits is 10372320, while the sum is 56.

The spelling of 66770780735 in words is "sixty-six billion, seven hundred seventy million, seven hundred eighty thousand, seven hundred thirty-five".