66098557490 has 32 divisors (see below), whose sum is σ = 136150191360. Its totient is φ = 22633026624.

The previous prime is 66098557457. The next prime is 66098557573. The reversal of 66098557490 is 9475589066.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 556670 + ... + 664889.

It is an arithmetic number, because the mean of its divisors is an integer number (4254693480).

Almost surely, 2^66098557490 is an apocalyptic number.

66098557490 is an abundant number, since it is smaller than the sum of its proper divisors (70051633870).

66098557490 is a wasteful number, since it uses less digits than its factorization.

66098557490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1222346.

The product of its (nonzero) digits is 16329600, while the sum is 59.

The spelling of 66098557490 in words is "sixty-six billion, ninety-eight million, five hundred fifty-seven thousand, four hundred ninety".