6567400561 has 8 divisors (see below), whose sum is σ = 6816712448. Its totient is φ = 6320430000.

The previous prime is 6567400537. The next prime is 6567400571. The reversal of 6567400561 is 1650047656.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a 7-Lehmer number, since φ(6567400561) divides (6567400561-1)⁷.

It is a cyclic number.

It is not a de Polignac number, because 6567400561 - 2¹³ = 6567392369 is a prime.

It is a super-2 number, since 2×6567400561² = 86261500257246229442, which contains 22 as substring.

It is the 81040-th Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6567400571) by changing a digit.

It is a nontrivial repunit in base 81039.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 579615 + ... + 590836.

It is an arithmetic number, because the mean of its divisors is an integer number (852089056).

Almost surely, 2^6567400561 is an apocalyptic number.

It is an amenable number.

6567400561 is a deficient number, since it is larger than the sum of its proper divisors (249311887).

6567400561 is a wasteful number, since it uses less digits than its factorization.

6567400561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1170663.

The product of its (nonzero) digits is 151200, while the sum is 40.

The square root of 6567400561 is about 81039.5000046274. The cubic root of 6567400561 is about 1872.6840084815.

The spelling of 6567400561 in words is "six billion, five hundred sixty-seven million, four hundred thousand, five hundred sixty-one".