66668501377 has 4 divisors (see below), whose sum is σ = 66672705280. Its totient is φ = 66664297476.

The previous prime is 66668501359. The next prime is 66668501411. The reversal of 66668501377 is 77310586666.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66668501377 - 2¹¹ = 66668499329 is a prime.

It is a super-2 number, since 2×66668501377² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66668501357) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2078073 + ... + 2109910.

It is an arithmetic number, because the mean of its divisors is an integer number (16668176320).

Almost surely, 2^66668501377 is an apocalyptic number.

It is an amenable number.

66668501377 is a deficient number, since it is larger than the sum of its proper divisors (4203903).

66668501377 is a wasteful number, since it uses less digits than its factorization.

66668501377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4203902.

The product of its (nonzero) digits is 7620480, while the sum is 55.

The spelling of 66668501377 in words is "sixty-six billion, six hundred sixty-eight million, five hundred one thousand, three hundred seventy-seven".