1620132667 has 2 divisors, whose sum is σ = 1620132668. Its totient is φ = 1620132666.

The previous prime is 1620132649. The next prime is 1620132677. The reversal of 1620132667 is 7662310261.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1620132667 - 2⁷ = 1620132539 is a prime.

It is not a weakly prime, because it can be changed into another prime (1620132677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 810066333 + 810066334.

It is an arithmetic number, because the mean of its divisors is an integer number (810066334).

Almost surely, 2^1620132667 is an apocalyptic number.

1620132667 is a deficient number, since it is larger than the sum of its proper divisors (1).

1620132667 is an equidigital number, since it uses as much as digits as its factorization.

1620132667 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 1620132667 is about 40250.8716303138. The cubic root of 1620132667 is about 1174.4923515833.

The spelling of 1620132667 in words is "one billion, six hundred twenty million, one hundred thirty-two thousand, six hundred sixty-seven".