84166667425 has 6 divisors (see below), whose sum is σ = 104366667638. Its totient is φ = 67333333920.

The previous prime is 84166667401. The next prime is 84166667503. The reversal of 84166667425 is 52476666148.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 2560461201 + 81606206224 = 50601^2 + 285668^2 .

It is not a de Polignac number, because 84166667425 - 2⁵ = 84166667393 is a prime.

It is a super-2 number, since 2×84166667425² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1683333324 + ... + 1683333373.

Almost surely, 2^84166667425 is an apocalyptic number.

It is an amenable number.

84166667425 is a deficient number, since it is larger than the sum of its proper divisors (20200000213).

84166667425 is a wasteful number, since it uses less digits than its factorization.

84166667425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3366666707 (or 3366666702 counting only the distinct ones).

The product of its digits is 11612160, while the sum is 55.

The spelling of 84166667425 in words is "eighty-four billion, one hundred sixty-six million, six hundred sixty-seven thousand, four hundred twenty-five".