66361368620 has 24 divisors (see below), whose sum is σ = 139363722288. Its totient is φ = 26543624000.

The previous prime is 66361368613. The next prime is 66361368659. The reversal of 66361368620 is 2686316366.

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 7 ways as a sum of consecutive naturals, for example, 1051355 + ... + 1112685.

It is an arithmetic number, because the mean of its divisors is an integer number (5806821762).

Almost surely, 2^66361368620 is an apocalyptic number.

It is an amenable number.

66361368620 is an abundant number, since it is smaller than the sum of its proper divisors (73002353668).

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

66361368620 is a wasteful number, since it uses less digits than its factorization.

66361368620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115441 (or 115439 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 47.

The spelling of 66361368620 in words is "sixty-six billion, three hundred sixty-one million, three hundred sixty-eight thousand, six hundred twenty".