166374487 has 2 divisors, whose sum is σ = 166374488. Its totient is φ = 166374486.

The previous prime is 166374463. The next prime is 166374491. The reversal of 166374487 is 784473661.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166374487 is a prime.

It is a congruent number.

It is a weakly prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83187243 + 83187244.

It is an arithmetic number, because the mean of its divisors is an integer number (83187244).

Almost surely, 2^166374487 is an apocalyptic number.

166374487 is a deficient number, since it is larger than the sum of its proper divisors (1).

166374487 is an equidigital number, since it uses as much as digits as its factorization.

166374487 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 166374487 is about 12898.6234536868. The cubic root of 166374487 is about 549.9994347102. Note that the first 3 decimals are identical.

The spelling of 166374487 in words is "one hundred sixty-six million, three hundred seventy-four thousand, four hundred eighty-seven".