2102664678 has 16 divisors (see below), whose sum is σ = 4426662720. Its totient is φ = 663999336.

The previous prime is 2102664677. The next prime is 2102664679. The reversal of 2102664678 is 8764662012.

It is an interprime number because it is at equal distance from previous prime (2102664677) and next prime (2102664679).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102664671) 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, 9222100 + ... + 9222327.

It is an arithmetic number, because the mean of its divisors is an integer number (276666420).

Almost surely, 2^2102664678 is an apocalyptic number.

2102664678 is an abundant number, since it is smaller than the sum of its proper divisors (2323998042).

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

2102664678 is a wasteful number, since it uses less digits than its factorization.

2102664678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18444451.

The product of its (nonzero) digits is 193536, while the sum is 42.

The square root of 2102664678 is about 45854.8217530065. The cubic root of 2102664678 is about 1281.1205759159.

The spelling of 2102664678 in words is "two billion, one hundred two million, six hundred sixty-four thousand, six hundred seventy-eight".