66363257 has 16 divisors (see below), whose sum is σ = 77189760. Its totient is φ = 56593152.

The previous prime is 66363251. The next prime is 66363263. The reversal of 66363257 is 75236366.

It is an interprime number because it is at equal distance from previous prime (66363251) and next prime (66363263).

It is a cyclic number.

It is not a de Polignac number, because 66363257 - 2⁸ = 66363001 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66363257.

It is not an unprimeable number, because it can be changed into a prime (66363251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2963 + ... + 11895.

It is an arithmetic number, because the mean of its divisors is an integer number (4824360).

Almost surely, 2^66363257 is an apocalyptic number.

It is an amenable number.

66363257 is a deficient number, since it is larger than the sum of its proper divisors (10826503).

66363257 is a wasteful number, since it uses less digits than its factorization.

66363257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8992.

The product of its digits is 136080, while the sum is 38.

The square root of 66363257 is about 8146.3646493390. The cubic root of 66363257 is about 404.8640645251.

The spelling of 66363257 in words is "sixty-six million, three hundred sixty-three thousand, two hundred fifty-seven".