66603430260 has 36 divisors (see below), whose sum is σ = 202030405668. Its totient is φ = 17760914688.

The previous prime is 66603430259. The next prime is 66603430279. The reversal of 66603430260 is 6203430666.

It can be written as a sum of positive squares in 2 ways, for example, as 9995600484 + 56607829776 = 99978^2 + 237924^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 185009349 + ... + 185009708.

It is an arithmetic number, because the mean of its divisors is an integer number (5611955713).

Almost surely, 2^66603430260 is an apocalyptic number.

66603430260 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66603430260 is an abundant number, since it is smaller than the sum of its proper divisors (135426975408).

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

66603430260 is a wasteful number, since it uses less digits than its factorization.

66603430260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370019072 (or 370019067 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 36.

The spelling of 66603430260 in words is "sixty-six billion, six hundred three million, four hundred thirty thousand, two hundred sixty".