2660688490 has 8 divisors (see below), whose sum is σ = 4789239300. Its totient is φ = 1064275392.

The previous prime is 2660688439. The next prime is 2660688517. The reversal of 2660688490 is 948860662.

It can be written as a sum of positive squares in 2 ways, for example, as 2612538769 + 48149721 = 51113^2 + 6939^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133034415 + ... + 133034434.

Almost surely, 2^2660688490 is an apocalyptic number.

2660688490 is a deficient number, since it is larger than the sum of its proper divisors (2128550810).

2660688490 is a wasteful number, since it uses less digits than its factorization.

2660688490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266068856.

The product of its (nonzero) digits is 995328, while the sum is 49.

The square root of 2660688490 is about 51581.8620253282. The cubic root of 2660688490 is about 1385.6855143200.

The spelling of 2660688490 in words is "two billion, six hundred sixty million, six hundred eighty-eight thousand, four hundred ninety".