66422742705 has 192 divisors, whose sum is σ = 133818048000. Its totient is φ = 30163415040.

The previous prime is 66422742649. The next prime is 66422742719. The reversal of 66422742705 is 50724722466.

It is a happy number.

It is not a de Polignac number, because 66422742705 - 2⁷ = 66422742577 is a prime.

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

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 190322871 + ... + 190323219.

It is an arithmetic number, because the mean of its divisors is an integer number (696969000).

Almost surely, 2^66422742705 is an apocalyptic number.

It is an amenable number.

66422742705 is an abundant number, since it is smaller than the sum of its proper divisors (67395305295).

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

66422742705 is a wasteful number, since it uses less digits than its factorization.

66422742705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696 (or 693 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 45.

The spelling of 66422742705 in words is "sixty-six billion, four hundred twenty-two million, seven hundred forty-two thousand, seven hundred five".