66319425 has 24 divisors (see below), whose sum is σ = 121832480. Its totient is φ = 35370000.

The previous prime is 66319411. The next prime is 66319457. The reversal of 66319425 is 52491366.

It is a happy number.

It is not a de Polignac number, because 66319425 - 2¹² = 66315329 is a prime.

It is a super-2 number, since 2×66319425² = 8796532264661250, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66319425.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48451 + ... + 49800.

Almost surely, 2^66319425 is an apocalyptic number.

It is an amenable number.

66319425 is a deficient number, since it is larger than the sum of its proper divisors (55513055).

66319425 is a wasteful number, since it uses less digits than its factorization.

66319425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98270 (or 98259 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 66319425 is about 8143.6739252011. The cubic root of 66319425 is about 404.7749092158.

The spelling of 66319425 in words is "sixty-six million, three hundred nineteen thousand, four hundred twenty-five".