7820671233661 has 32 divisors (see below), whose sum is σ = 9744416252928. Its totient is φ = 6166576880640.

The previous prime is 7820671233649. The next prime is 7820671233691. The reversal of 7820671233661 is 1663321760287.

It is not a de Polignac number, because 7820671233661 - 2⁷ = 7820671233533 is a prime.

It is a super-2 number, since 2×7820671233661² (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 = 7820671233599 and 7820671233608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7820671233691) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1174350 + ... + 4125583.

It is an arithmetic number, because the mean of its divisors is an integer number (304513007904).

Almost surely, 2^{7820671233661} is an apocalyptic number.

It is an amenable number.

7820671233661 is a deficient number, since it is larger than the sum of its proper divisors (1923745019267).

7820671233661 is a wasteful number, since it uses less digits than its factorization.

7820671233661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5300581.

The product of its (nonzero) digits is 3048192, while the sum is 52.

The spelling of 7820671233661 in words is "seven trillion, eight hundred twenty billion, six hundred seventy-one million, two hundred thirty-three thousand, six hundred sixty-one".