65625646 has 4 divisors (see below), whose sum is σ = 98438472. Its totient is φ = 32812822.

The previous prime is 65625643. The next prime is 65625649. The reversal of 65625646 is 64652656.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (65625643) and next prime (65625649).

It is a junction number, because it is equal to n+sod(n) for n = 65625599 and 65625608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65625643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16406410 + ... + 16406413.

It is an arithmetic number, because the mean of its divisors is an integer number (24609618).

Almost surely, 2^65625646 is an apocalyptic number.

65625646 is a deficient number, since it is larger than the sum of its proper divisors (32812826).

65625646 is a wasteful number, since it uses less digits than its factorization.

65625646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32812825.

The product of its digits is 259200, while the sum is 40.

The square root of 65625646 is about 8100.9657448973. The cubic root of 65625646 is about 403.3584850255.

The spelling of 65625646 in words is "sixty-five million, six hundred twenty-five thousand, six hundred forty-six".