1665000061563 has 32 divisors (see below), whose sum is σ = 2240513263872. Its totient is φ = 1099801382400.

The previous prime is 1665000061561. The next prime is 1665000061601. The reversal of 1665000061563 is 3651600005661.

It is not a de Polignac number, because 1665000061563 - 2¹ = 1665000061561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1665000061561) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 154576368 + ... + 154587138.

It is an arithmetic number, because the mean of its divisors is an integer number (70016039496).

Almost surely, 2^{1665000061563} is an apocalyptic number.

1665000061563 is a deficient number, since it is larger than the sum of its proper divisors (575513202309).

1665000061563 is a wasteful number, since it uses less digits than its factorization.

1665000061563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12075.

The product of its (nonzero) digits is 97200, while the sum is 39.

The spelling of 1665000061563 in words is "one trillion, six hundred sixty-five billion, sixty-one thousand, five hundred sixty-three".