6974920661 has 4 divisors (see below), whose sum is σ = 6975091500. Its totient is φ = 6974749824.

The previous prime is 6974920597. The next prime is 6974920699. The reversal of 6974920661 is 1660294796.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 362140900 + 6612779761 = 19030^2 + 81319^2 .

It is a cyclic number.

It is not a de Polignac number, because 6974920661 - 2⁶ = 6974920597 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 (6974920261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15815 + ... + 119163.

It is an arithmetic number, because the mean of its divisors is an integer number (1743772875).

Almost surely, 2^6974920661 is an apocalyptic number.

It is an amenable number.

6974920661 is a deficient number, since it is larger than the sum of its proper divisors (170839).

6974920661 is a wasteful number, since it uses less digits than its factorization.

6974920661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170838.

The product of its (nonzero) digits is 979776, while the sum is 50.

The square root of 6974920661 is about 83515.9904509310. The cubic root of 6974920661 is about 1910.6439228516.

The spelling of 6974920661 in words is "six billion, nine hundred seventy-four million, nine hundred twenty thousand, six hundred sixty-one".