66536211265020 has 144 divisors (see below), whose sum is σ = 231068564213760. Its totient is φ = 15181263773568.

The previous prime is 66536211265001. The next prime is 66536211265031. The reversal of 66536211265020 is 2056211263566.

66536211265020 is a `hidden beast` number, since 6 + 6 + 5 + 3 + 621 + 12 + 6 + 5 + 0 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 46188060 + ... + 47606819.

It is an arithmetic number, because the mean of its divisors is an integer number (1604642807040).

Almost surely, 2^{66536211265020} is an apocalyptic number.

66536211265020 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66536211265020 is an abundant number, since it is smaller than the sum of its proper divisors (164532352948740).

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

66536211265020 is a wasteful number, since it uses less digits than its factorization.

66536211265020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93795464 (or 93795459 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 45.

The spelling of 66536211265020 in words is "sixty-six trillion, five hundred thirty-six billion, two hundred eleven million, two hundred sixty-five thousand, twenty".