1661326352426 has 16 divisors (see below), whose sum is σ = 2686626931968. Its totient is φ = 765924322800.

The previous prime is 1661326352407. The next prime is 1661326352461. The reversal of 1661326352426 is 6242536231661.

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, 35046110 + ... + 35093481.

It is an arithmetic number, because the mean of its divisors is an integer number (167914183248).

Almost surely, 2^{1661326352426} is an apocalyptic number.

1661326352426 is a deficient number, since it is larger than the sum of its proper divisors (1025300579542).

1661326352426 is a wasteful number, since it uses less digits than its factorization.

1661326352426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70140517.

The product of its digits is 1866240, while the sum is 47.

The spelling of 1661326352426 in words is "one trillion, six hundred sixty-one billion, three hundred twenty-six million, three hundred fifty-two thousand, four hundred twenty-six".