1677664631 has 2 divisors, whose sum is σ = 1677664632. Its totient is φ = 1677664630.

The previous prime is 1677664621. The next prime is 1677664633. The reversal of 1677664631 is 1364667761.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1677664631 is a prime.

It is a super-2 number, since 2×1677664631² = 5629117228216732322, which contains 22 as substring.

Together with 1677664633, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1677664633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 838832315 + 838832316.

It is an arithmetic number, because the mean of its divisors is an integer number (838832316).

Almost surely, 2^1677664631 is an apocalyptic number.

1677664631 is a deficient number, since it is larger than the sum of its proper divisors (1).

1677664631 is an equidigital number, since it uses as much as digits as its factorization.

1677664631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 762048, while the sum is 47.

The square root of 1677664631 is about 40959.3045717331. The cubic root of 1677664631 is about 1188.2332918165.

The spelling of 1677664631 in words is "one billion, six hundred seventy-seven million, six hundred sixty-four thousand, six hundred thirty-one".