84672661 has 2 divisors, whose sum is σ = 84672662. Its totient is φ = 84672660.

The previous prime is 84672649. The next prime is 84672673. The reversal of 84672661 is 16627648.

It is a balanced prime because it is at equal distance from previous prime (84672649) and next prime (84672673).

It can be written as a sum of positive squares in only one way, i.e., 62110161 + 22562500 = 7881^2 + 4750^2 .

It is a cyclic number.

It is not a de Polignac number, because 84672661 - 2⁵ = 84672629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84670661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42336330 + 42336331.

It is an arithmetic number, because the mean of its divisors is an integer number (42336331).

Almost surely, 2^84672661 is an apocalyptic number.

It is an amenable number.

84672661 is a deficient number, since it is larger than the sum of its proper divisors (1).

84672661 is an equidigital number, since it uses as much as digits as its factorization.

84672661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 40.

The square root of 84672661 is about 9201.7748831408. The cubic root of 84672661 is about 439.1178278685.

The spelling of 84672661 in words is "eighty-four million, six hundred seventy-two thousand, six hundred sixty-one".