8660625381 has 10 divisors (see below), whose sum is σ = 12937477542. Its totient is φ = 5773750200.

The previous prime is 8660625377. The next prime is 8660625397. The reversal of 8660625381 is 1835260668.

8660625381 is a `hidden beast` number, since 8 + 6 + 606 + 2 + 5 + 38 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 6774113025 + 1886512356 = 82305^2 + 43434^2 .

It is not a de Polignac number, because 8660625381 - 2² = 8660625377 is a prime.

It is a super-2 number, since 2×8660625381² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8660625301) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 53460570 + ... + 53460731.

Almost surely, 2^8660625381 is an apocalyptic number.

8660625381 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

It is an amenable number.

8660625381 is a deficient number, since it is larger than the sum of its proper divisors (4276852161).

8660625381 is a wasteful number, since it uses less digits than its factorization.

8660625381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106921313 (or 106921304 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The square root of 8660625381 is about 93062.4810597697. The cubic root of 8660625381 is about 2053.6026581396.

The spelling of 8660625381 in words is "eight billion, six hundred sixty million, six hundred twenty-five thousand, three hundred eighty-one".