66012425 has 6 divisors (see below), whose sum is σ = 81855438. Its totient is φ = 52809920.

The previous prime is 66012413. The next prime is 66012433. The reversal of 66012425 is 52421066.

It can be written as a sum of positive squares in 3 ways, for example, as 126736 + 65885689 = 356^2 + 8117^2 .

It is not a de Polignac number, because 66012425 - 2⁸ = 66012169 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66012394 and 66012403.

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, 1320224 + ... + 1320273.

It is an arithmetic number, because the mean of its divisors is an integer number (13642573).

Almost surely, 2^66012425 is an apocalyptic number.

It is an amenable number.

66012425 is a deficient number, since it is larger than the sum of its proper divisors (15843013).

66012425 is a wasteful number, since it uses less digits than its factorization.

66012425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2640507 (or 2640502 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 66012425 is about 8124.8030745366. The cubic root of 66012425 is about 404.1493602726.

The spelling of 66012425 in words is "sixty-six million, twelve thousand, four hundred twenty-five".