1667447461 has 2 divisors, whose sum is σ = 1667447462. Its totient is φ = 1667447460.

The previous prime is 1667447449. The next prime is 1667447473. The reversal of 1667447461 is 1647447661.

It is a balanced prime because it is at equal distance from previous prime (1667447449) and next prime (1667447473).

It can be written as a sum of positive squares in only one way, i.e., 1662111361 + 5336100 = 40769^2 + 2310^2 .

It is a cyclic number.

It is not a de Polignac number, because 1667447461 - 2¹³ = 1667439269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1667447401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 833723730 + 833723731.

It is an arithmetic number, because the mean of its divisors is an integer number (833723731).

Almost surely, 2^1667447461 is an apocalyptic number.

It is an amenable number.

1667447461 is a deficient number, since it is larger than the sum of its proper divisors (1).

1667447461 is an equidigital number, since it uses as much as digits as its factorization.

1667447461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 677376, while the sum is 46.

The square root of 1667447461 is about 40834.3906652224. The cubic root of 1667447461 is about 1185.8162194010.

The spelling of 1667447461 in words is "one billion, six hundred sixty-seven million, four hundred forty-seven thousand, four hundred sixty-one".