7660861381 has 8 divisors (see below), whose sum is σ = 7882338464. Its totient is φ = 7441353360.

The previous prime is 7660861363. The next prime is 7660861387. The reversal of 7660861381 is 1831680667.

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

It is a cyclic number.

It is not a de Polignac number, because 7660861381 - 2⁷ = 7660861253 is a prime.

It is a super-2 number, since 2×7660861381² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7660861387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 484371 + ... + 499936.

It is an arithmetic number, because the mean of its divisors is an integer number (985292308).

Almost surely, 2^7660861381 is an apocalyptic number.

It is an amenable number.

7660861381 is a deficient number, since it is larger than the sum of its proper divisors (221477083).

7660861381 is a wasteful number, since it uses less digits than its factorization.

7660861381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 984531.

The product of its (nonzero) digits is 290304, while the sum is 46.

The square root of 7660861381 is about 87526.3467819833. The cubic root of 7660861381 is about 1971.3294110222.

The spelling of 7660861381 in words is "seven billion, six hundred sixty million, eight hundred sixty-one thousand, three hundred eighty-one".