666777337101 has 12 divisors (see below), whose sum is σ = 996333952380. Its totient is φ = 429190009920.

The previous prime is 666777337063. The next prime is 666777337111. The reversal of 666777337101 is 101733777666.

It can be written as a sum of positive squares in 2 ways, for example, as 373197588201 + 293579748900 = 610899^2 + 541830^2 .

It is not a de Polignac number, because 666777337101 - 2²⁵ = 666743782669 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666777337111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1277350960 + ... + 1277351481.

It is an arithmetic number, because the mean of its divisors is an integer number (83027829365).

Almost surely, 2^666777337101 is an apocalyptic number.

It is an amenable number.

666777337101 is a deficient number, since it is larger than the sum of its proper divisors (329556615279).

666777337101 is a wasteful number, since it uses less digits than its factorization.

666777337101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2554702476 (or 2554702473 counting only the distinct ones).

The product of its (nonzero) digits is 4667544, while the sum is 54.

The spelling of 666777337101 in words is "six hundred sixty-six billion, seven hundred seventy-seven million, three hundred thirty-seven thousand, one hundred one".