66620265 has 8 divisors (see below), whose sum is σ = 106592448. Its totient is φ = 35530800.

The previous prime is 66620237. The next prime is 66620293. The reversal of 66620265 is 56202666.

It is an interprime number because it is at equal distance from previous prime (66620237) and next prime (66620293).

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

It is a de Polignac number, because none of the positive numbers 2^k-66620265 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2220661 + ... + 2220690.

It is an arithmetic number, because the mean of its divisors is an integer number (13324056).

Almost surely, 2^66620265 is an apocalyptic number.

It is an amenable number.

66620265 is a deficient number, since it is larger than the sum of its proper divisors (39972183).

66620265 is a wasteful number, since it uses less digits than its factorization.

66620265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4441359.

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 66620265 is about 8162.1238045009. The cubic root of 66620265 is about 405.3860364338.

The spelling of 66620265 in words is "sixty-six million, six hundred twenty thousand, two hundred sixty-five".