66760425 has 18 divisors (see below), whose sum is σ = 119575742. Its totient is φ = 35605440.

The previous prime is 66760409. The next prime is 66760439. The reversal of 66760425 is 52406766.

It can be written as a sum of positive squares in 3 ways, for example, as 11451456 + 55308969 = 3384^2 + 7437^2 .

It is not a de Polignac number, because 66760425 - 2⁴ = 66760409 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66760425.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 148132 + ... + 148581.

Almost surely, 2^66760425 is an apocalyptic number.

It is an amenable number.

66760425 is a deficient number, since it is larger than the sum of its proper divisors (52815317).

66760425 is a wasteful number, since it uses less digits than its factorization.

66760425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296729 (or 296721 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The square root of 66760425 is about 8170.7052939144. The cubic root of 66760425 is about 405.6701297046.

The spelling of 66760425 in words is "sixty-six million, seven hundred sixty thousand, four hundred twenty-five".