84669661 has 4 divisors (see below), whose sum is σ = 86104800. Its totient is φ = 83234524.

The previous prime is 84669659. The next prime is 84669667. The reversal of 84669661 is 16696648.

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 a cyclic number.

It is not a de Polignac number, because 84669661 - 2¹ = 84669659 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 (84669667) 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, 717481 + ... + 717598.

It is an arithmetic number, because the mean of its divisors is an integer number (21526200).

Almost surely, 2^84669661 is an apocalyptic number.

It is an amenable number.

84669661 is a deficient number, since it is larger than the sum of its proper divisors (1435139).

84669661 is a wasteful number, since it uses less digits than its factorization.

84669661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1435138.

The product of its digits is 373248, while the sum is 46.

The square root of 84669661 is about 9201.6118696672. The cubic root of 84669661 is about 439.1126417434.

It can be divided in two parts, 846 and 69661, that added together give a palindrome (70507).

The spelling of 84669661 in words is "eighty-four million, six hundred sixty-nine thousand, six hundred sixty-one".