6425661201366 has 64 divisors (see below), whose sum is σ = 14042971835136. Its totient is φ = 1943929545600.

The previous prime is 6425661201313. The next prime is 6425661201403. The reversal of 6425661201366 is 6631021665246.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 125130856 + ... + 125182196.

It is an arithmetic number, because the mean of its divisors is an integer number (219421434924).

Almost surely, 2^{6425661201366} is an apocalyptic number.

6425661201366 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

6425661201366 is an abundant number, since it is smaller than the sum of its proper divisors (7617310633770).

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

6425661201366 is a wasteful number, since it uses less digits than its factorization.

6425661201366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54477.

The product of its (nonzero) digits is 1866240, while the sum is 48.

The spelling of 6425661201366 in words is "six trillion, four hundred twenty-five billion, six hundred sixty-one million, two hundred one thousand, three hundred sixty-six".