7210677661 has 4 divisors (see below), whose sum is σ = 7866193824. Its totient is φ = 6555161500.

The previous prime is 7210677659. The next prime is 7210677673. The reversal of 7210677661 is 1667760127.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1667760127 = 11 ⋅151614557.

It is a cyclic number.

It is not a de Polignac number, because 7210677661 - 2¹ = 7210677659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7210677361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 327758065 + ... + 327758086.

It is an arithmetic number, because the mean of its divisors is an integer number (1966548456).

Almost surely, 2^7210677661 is an apocalyptic number.

It is an amenable number.

7210677661 is a deficient number, since it is larger than the sum of its proper divisors (655516163).

7210677661 is a wasteful number, since it uses less digits than its factorization.

7210677661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655516162.

The product of its (nonzero) digits is 148176, while the sum is 43.

The square root of 7210677661 is about 84915.7091532539. The cubic root of 7210677661 is about 1931.9328503546.

The spelling of 7210677661 in words is "seven billion, two hundred ten million, six hundred seventy-seven thousand, six hundred sixty-one".