66526625 has 16 divisors (see below), whose sum is σ = 90574848. Its totient is φ = 48382000.

The previous prime is 66526613. The next prime is 66526643. The reversal of 66526625 is 52662566.

It is a de Polignac number, because none of the positive numbers 2^k-66526625 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22817 + ... + 25566.

It is an arithmetic number, because the mean of its divisors is an integer number (5660928).

Almost surely, 2^66526625 is an apocalyptic number.

It is an amenable number.

66526625 is a deficient number, since it is larger than the sum of its proper divisors (24048223).

66526625 is a wasteful number, since it uses less digits than its factorization.

66526625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48409 (or 48399 counting only the distinct ones).

The product of its digits is 129600, while the sum is 38.

The square root of 66526625 is about 8156.3855352723. The cubic root of 66526625 is about 405.1960134342.

The spelling of 66526625 in words is "sixty-six million, five hundred twenty-six thousand, six hundred twenty-five".