331661677 has 2 divisors, whose sum is σ = 331661678. Its totient is φ = 331661676.

The previous prime is 331661641. The next prime is 331661683. The reversal of 331661677 is 776166133.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 276024996 + 55636681 = 16614^2 + 7459^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331661677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331661977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165830838 + 165830839.

It is an arithmetic number, because the mean of its divisors is an integer number (165830839).

Almost surely, 2^331661677 is an apocalyptic number.

It is an amenable number.

331661677 is a deficient number, since it is larger than the sum of its proper divisors (1).

331661677 is an equidigital number, since it uses as much as digits as its factorization.

331661677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 95256, while the sum is 40.

The square root of 331661677 is about 18211.5808484601. The cubic root of 331661677 is about 692.2002696158.

It can be divided in two parts, 33166 and 1677, that added together give a palindrome (34843).

The spelling of 331661677 in words is "three hundred thirty-one million, six hundred sixty-one thousand, six hundred seventy-seven".