2666937678 has 16 divisors (see below), whose sum is σ = 5372250240. Its totient is φ = 882583416.

The previous prime is 2666937677. The next prime is 2666937727. The reversal of 2666937678 is 8767396662.

It is a super-2 number, since 2×2666937678² = 14225113156672063368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2666937673) 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, 1598050 + ... + 1599717.

It is an arithmetic number, because the mean of its divisors is an integer number (335765640).

Almost surely, 2^2666937678 is an apocalyptic number.

2666937678 is an abundant number, since it is smaller than the sum of its proper divisors (2705312562).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2666937678 is a wasteful number, since it uses less digits than its factorization.

2666937678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3197911.

The product of its digits is 27433728, while the sum is 60.

The square root of 2666937678 is about 51642.4019387170. The cubic root of 2666937678 is about 1386.7695243008.

The spelling of 2666937678 in words is "two billion, six hundred sixty-six million, nine hundred thirty-seven thousand, six hundred seventy-eight".