66610137077 has 16 divisors (see below), whose sum is σ = 72789235200. Its totient is φ = 60451757040.

The previous prime is 66610137023. The next prime is 66610137089. The reversal of 66610137077 is 77073101666.

66610137077 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 66610137077 - 2²⁶ = 66543028213 is a prime.

It is a super-2 number, since 2×66610137077² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66610137017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27087074 + ... + 27089532.

It is an arithmetic number, because the mean of its divisors is an integer number (4549327200).

Almost surely, 2^66610137077 is an apocalyptic number.

It is an amenable number.

66610137077 is a deficient number, since it is larger than the sum of its proper divisors (6179098123).

66610137077 is a wasteful number, since it uses less digits than its factorization.

66610137077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5656.

The product of its (nonzero) digits is 222264, while the sum is 44.

The spelling of 66610137077 in words is "sixty-six billion, six hundred ten million, one hundred thirty-seven thousand, seventy-seven".