66021564202983 has 40 divisors (see below), whose sum is σ = 99452811105120. Its totient is φ = 43645552392960.

The previous prime is 66021564202949. The next prime is 66021564202991. The reversal of 66021564202983 is 38920246512066.

66021564202983 is a `hidden beast` number, since 6 + 60 + 2 + 156 + 420 + 2 + 9 + 8 + 3 = 666.

It is not a de Polignac number, because 66021564202983 - 2⁹ = 66021564202471 is a prime.

It is a super-3 number, since 3×66021564202983³ (a number of 42 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66021564242983) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 6961203 + ... + 13435083.

It is an arithmetic number, because the mean of its divisors is an integer number (2486320277628).

Almost surely, 2^{66021564202983} is an apocalyptic number.

66021564202983 is a deficient number, since it is larger than the sum of its proper divisors (33431246902137).

66021564202983 is a wasteful number, since it uses less digits than its factorization.

66021564202983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6474949 (or 6474940 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 54.

The spelling of 66021564202983 in words is "sixty-six trillion, twenty-one billion, five hundred sixty-four million, two hundred two thousand, nine hundred eighty-three".