2578669660 has 24 divisors (see below), whose sum is σ = 6188807520. Its totient is φ = 884115264.

The previous prime is 2578669657. The next prime is 2578669663. The reversal of 2578669660 is 669668752.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2578669657) and next prime (2578669663).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2578669663) 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, 9209395 + ... + 9209674.

It is an arithmetic number, because the mean of its divisors is an integer number (257866980).

Almost surely, 2^2578669660 is an apocalyptic number.

2578669660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2578669660 is an abundant number, since it is smaller than the sum of its proper divisors (3610137860).

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

2578669660 is a wasteful number, since it uses less digits than its factorization.

2578669660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18419085 (or 18419083 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 55.

The square root of 2578669660 is about 50780.6031866499. The cubic root of 2578669660 is about 1371.2981922703.

The spelling of 2578669660 in words is "two billion, five hundred seventy-eight million, six hundred sixty-nine thousand, six hundred sixty".