387666822257 has 16 divisors (see below), whose sum is σ = 482231377152. Its totient is φ = 306178648320.

The previous prime is 387666822233. The next prime is 387666822281. The reversal of 387666822257 is 752228666783.

It is an interprime number because it is at equal distance from previous prime (387666822233) and next prime (387666822281).

It is a cyclic number.

It is not a de Polignac number, because 387666822257 - 2³⁸ = 112788915313 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 387666822257.

It is not an unprimeable number, because it can be changed into a prime (387666822217) 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, 79731593 + ... + 79736454.

It is an arithmetic number, because the mean of its divisors is an integer number (30139461072).

Almost surely, 2^387666822257 is an apocalyptic number.

It is an amenable number.

387666822257 is a deficient number, since it is larger than the sum of its proper divisors (94564554895).

387666822257 is a wasteful number, since it uses less digits than its factorization.

387666822257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159468088.

The product of its digits is 81285120, while the sum is 62.

The spelling of 387666822257 in words is "three hundred eighty-seven billion, six hundred sixty-six million, eight hundred twenty-two thousand, two hundred fifty-seven".