7738207870661 has 8 divisors (see below), whose sum is σ = 8025684488448. Its totient is φ = 7453097316000.

The previous prime is 7738207870621. The next prime is 7738207870667. The reversal of 7738207870661 is 1660787028377.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7738207870661 is a prime.

It is a super-2 number, since 2×7738207870661² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7738207870594 and 7738207870603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7738207870667) 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, 591509120 + ... + 591522201.

It is an arithmetic number, because the mean of its divisors is an integer number (1003210561056).

Almost surely, 2^{7738207870661} is an apocalyptic number.

It is an amenable number.

7738207870661 is a deficient number, since it is larger than the sum of its proper divisors (287476617787).

7738207870661 is a wasteful number, since it uses less digits than its factorization.

7738207870661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1183031563.

The product of its (nonzero) digits is 33191424, while the sum is 62.

The spelling of 7738207870661 in words is "seven trillion, seven hundred thirty-eight billion, two hundred seven million, eight hundred seventy thousand, six hundred sixty-one".