84766561 has 4 divisors (see below), whose sum is σ = 92472624. Its totient is φ = 77060500.

The previous prime is 84766559. The next prime is 84766579. The reversal of 84766561 is 16566748.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 84766561 - 2¹ = 84766559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84766501) 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, 3853015 + ... + 3853036.

It is an arithmetic number, because the mean of its divisors is an integer number (23118156).

Almost surely, 2^84766561 is an apocalyptic number.

It is an amenable number.

84766561 is a deficient number, since it is larger than the sum of its proper divisors (7706063).

84766561 is a wasteful number, since it uses less digits than its factorization.

84766561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7706062.

The product of its digits is 241920, while the sum is 43.

The square root of 84766561 is about 9206.8757458760. The cubic root of 84766561 is about 439.2800917001.

The spelling of 84766561 in words is "eighty-four million, seven hundred sixty-six thousand, five hundred sixty-one".