1405481235666 has 32 divisors (see below), whose sum is σ = 3021863362560. Its totient is φ = 434392855056.

The previous prime is 1405481235581. The next prime is 1405481235671. The reversal of 1405481235666 is 6665321845041.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131151906 + ... + 131162621.

It is an arithmetic number, because the mean of its divisors is an integer number (94433230080).

Almost surely, 2^{1405481235666} is an apocalyptic number.

1405481235666 is an abundant number, since it is smaller than the sum of its proper divisors (1616382126894).

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

1405481235666 is a wasteful number, since it uses less digits than its factorization.

1405481235666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262314598.

The product of its (nonzero) digits is 4147200, while the sum is 51.

The spelling of 1405481235666 in words is "one trillion, four hundred five billion, four hundred eighty-one million, two hundred thirty-five thousand, six hundred sixty-six".