2666952381 has 8 divisors (see below), whose sum is σ = 3557894400. Its totient is φ = 1776989312.

The previous prime is 2666952371. The next prime is 2666952439. The reversal of 2666952381 is 1832596662.

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 2666952381 - 2³⁰ = 1593210557 is a prime.

It is a super-3 number, since 3×2666952381³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 2666952381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2666952361) 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, 238356 + ... + 249293.

It is an arithmetic number, because the mean of its divisors is an integer number (444736800).

Almost surely, 2^2666952381 is an apocalyptic number.

It is an amenable number.

2666952381 is a deficient number, since it is larger than the sum of its proper divisors (890942019).

2666952381 is a wasteful number, since it uses less digits than its factorization.

2666952381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489475.

The product of its digits is 933120, while the sum is 48.

The square root of 2666952381 is about 51642.5442924727. The cubic root of 2666952381 is about 1386.7720727462.

The spelling of 2666952381 in words is "two billion, six hundred sixty-six million, nine hundred fifty-two thousand, three hundred eighty-one".