1427666345685 has 24 divisors (see below), whose sum is σ = 2474697849624. Its totient is φ = 761398609920.

The previous prime is 1427666345671. The next prime is 1427666345711. The reversal of 1427666345685 is 5865436667241.

It can be written as a sum of positive squares in 4 ways, for example, as 517475932164 + 910190413521 = 719358^2 + 954039^2 .

It is not a de Polignac number, because 1427666345685 - 2⁷ = 1427666345557 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1042309 + ... + 1985381.

It is an arithmetic number, because the mean of its divisors is an integer number (103112410401).

Almost surely, 2^{1427666345685} is an apocalyptic number.

1427666345685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1427666345685 is a deficient number, since it is larger than the sum of its proper divisors (1047031503939).

1427666345685 is a wasteful number, since it uses less digits than its factorization.

1427666345685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 976725 (or 976722 counting only the distinct ones).

The product of its digits is 174182400, while the sum is 63.

The spelling of 1427666345685 in words is "one trillion, four hundred twenty-seven billion, six hundred sixty-six million, three hundred forty-five thousand, six hundred eighty-five".