84770661 has 4 divisors (see below), whose sum is σ = 113027552. Its totient is φ = 56513772.

The previous prime is 84770603. The next prime is 84770681. The reversal of 84770661 is 16607748.

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 84770661 - 2⁶ = 84770597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84770681) 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, 14128441 + ... + 14128446.

It is an arithmetic number, because the mean of its divisors is an integer number (28256888).

Almost surely, 2^84770661 is an apocalyptic number.

It is an amenable number.

84770661 is a deficient number, since it is larger than the sum of its proper divisors (28256891).

84770661 is a wasteful number, since it uses less digits than its factorization.

84770661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28256890.

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 84770661 is about 9207.0984028629. The cubic root of 84770661 is about 439.2871739713.

The spelling of 84770661 in words is "eighty-four million, seven hundred seventy thousand, six hundred sixty-one".