84066945 has 16 divisors (see below), whose sum is σ = 134635392. Its totient is φ = 44792960.

The previous prime is 84066943. The next prime is 84066959. The reversal of 84066945 is 54966048.

It is not a de Polignac number, because 84066945 - 2¹ = 84066943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 84066897 and 84066906.

It is not an unprimeable number, because it can be changed into a prime (84066943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19540 + ... + 23450.

It is an arithmetic number, because the mean of its divisors is an integer number (8414712).

Almost surely, 2^84066945 is an apocalyptic number.

It is an amenable number.

84066945 is a deficient number, since it is larger than the sum of its proper divisors (50568447).

84066945 is a wasteful number, since it uses less digits than its factorization.

84066945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5352.

The product of its (nonzero) digits is 207360, while the sum is 42.

The square root of 84066945 is about 9168.8028117088. The cubic root of 84066945 is about 438.0682271066.

It can be divided in two parts, 8406 and 6945, that added together give a palindrome (15351).

The spelling of 84066945 in words is "eighty-four million, sixty-six thousand, nine hundred forty-five".