66777101 has 8 divisors (see below), whose sum is σ = 67317120. Its totient is φ = 66239712.

The previous prime is 66777097. The next prime is 66777103. The reversal of 66777101 is 10177766.

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 66777101 - 2² = 66777097 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66777103) 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, 107570 + ... + 108188.

It is an arithmetic number, because the mean of its divisors is an integer number (8414640).

Almost surely, 2^66777101 is an apocalyptic number.

It is an amenable number.

66777101 is a deficient number, since it is larger than the sum of its proper divisors (540019).

66777101 is a wasteful number, since it uses less digits than its factorization.

66777101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1315.

The product of its (nonzero) digits is 12348, while the sum is 35.

The square root of 66777101 is about 8171.7257051372. The cubic root of 66777101 is about 405.7039041645.

The spelling of 66777101 in words is "sixty-six million, seven hundred seventy-seven thousand, one hundred one".