66245319 has 24 divisors (see below), whose sum is σ = 110045312. Its totient is φ = 37616400.

The previous prime is 66245317. The next prime is 66245339. The reversal of 66245319 is 91354266.

It is a happy number.

It is not a de Polignac number, because 66245319 - 2¹ = 66245317 is a prime.

It is a super-2 number, since 2×66245319² = 8776884578823522, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66245317) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7044 + ... + 13494.

Almost surely, 2^66245319 is an apocalyptic number.

66245319 is a deficient number, since it is larger than the sum of its proper divisors (43799993).

66245319 is a wasteful number, since it uses less digits than its factorization.

66245319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6627 (or 6624 counting only the distinct ones).

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

The square root of 66245319 is about 8139.1227414261. The cubic root of 66245319 is about 404.6240864915.

It can be divided in two parts, 66245 and 319, that added together give a square (66564 = 258²).

The spelling of 66245319 in words is "sixty-six million, two hundred forty-five thousand, three hundred nineteen".