6600516432401 has 4 divisors (see below), whose sum is σ = 6600535045812. Its totient is φ = 6600497818992.

The previous prime is 6600516432269. The next prime is 6600516432403. The reversal of 6600516432401 is 1042346150066.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3012810705025 + 3587705727376 = 1735745^2 + 1894124^2 .

It is a cyclic number.

It is not a de Polignac number, because 6600516432401 - 2⁴² = 2202469921297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6600516432403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8764250 + ... + 9487523.

It is an arithmetic number, because the mean of its divisors is an integer number (1650133761453).

Almost surely, 2^{6600516432401} is an apocalyptic number.

It is an amenable number.

6600516432401 is a deficient number, since it is larger than the sum of its proper divisors (18613411).

6600516432401 is a wasteful number, since it uses less digits than its factorization.

6600516432401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18613410.

The product of its (nonzero) digits is 103680, while the sum is 38.

The spelling of 6600516432401 in words is "six trillion, six hundred billion, five hundred sixteen million, four hundred thirty-two thousand, four hundred one".