66102028292640 has 48 divisors (see below), whose sum is σ = 208221389123328. Its totient is φ = 17627207544576.

The previous prime is 66102028292591. The next prime is 66102028292653. The reversal of 66102028292640 is 4629282020166.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 66102028292640.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68856278992 + ... + 68856279951.

It is an arithmetic number, because the mean of its divisors is an integer number (4337945606736).

Almost surely, 2^{66102028292640} is an apocalyptic number.

66102028292640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66102028292640 is an abundant number, since it is smaller than the sum of its proper divisors (142119360830688).

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

66102028292640 is a wasteful number, since it uses less digits than its factorization.

66102028292640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137712558961 (or 137712558953 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 48.

The spelling of 66102028292640 in words is "sixty-six trillion, one hundred two billion, twenty-eight million, two hundred ninety-two thousand, six hundred forty".