66401615661122 has 8 divisors (see below), whose sum is σ = 113831341133376. Its totient is φ = 28457835283332.

The previous prime is 66401615660983. The next prime is 66401615661211. The reversal of 66401615661122 is 22116651610466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×66401615661122² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2371486273598 + ... + 2371486273625.

It is an arithmetic number, because the mean of its divisors is an integer number (14228917641672).

Almost surely, 2^{66401615661122} is an apocalyptic number.

66401615661122 is a deficient number, since it is larger than the sum of its proper divisors (47429725472254).

66401615661122 is a wasteful number, since it uses less digits than its factorization.

66401615661122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4742972547232.

The product of its (nonzero) digits is 622080, while the sum is 47.

The spelling of 66401615661122 in words is "sixty-six trillion, four hundred one billion, six hundred fifteen million, six hundred sixty-one thousand, one hundred twenty-two".