66525601 has 8 divisors (see below), whose sum is σ = 68200704. Its totient is φ = 64856400.

The previous prime is 66525577. The next prime is 66525629. The reversal of 66525601 is 10652566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66525601 - 2⁹ = 66525089 is a prime.

It is a super-2 number, since 2×66525601² = 8851311176822402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66525671) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29040 + ... + 31246.

It is an arithmetic number, because the mean of its divisors is an integer number (8525088).

Almost surely, 2^66525601 is an apocalyptic number.

It is an amenable number.

66525601 is a deficient number, since it is larger than the sum of its proper divisors (1675103).

66525601 is a wasteful number, since it uses less digits than its factorization.

66525601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2951.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 66525601 is about 8156.3227621276. The cubic root of 66525601 is about 405.1939344528.

The spelling of 66525601 in words is "sixty-six million, five hundred twenty-five thousand, six hundred one".