166354451 has 2 divisors, whose sum is σ = 166354452. Its totient is φ = 166354450.

The previous prime is 166354429. The next prime is 166354457. The reversal of 166354451 is 154453661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166354451 - 2²² = 162160147 is a prime.

It is a super-2 number, since 2×166354451² = 55347606735022802, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (166354457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83177225 + 83177226.

It is an arithmetic number, because the mean of its divisors is an integer number (83177226).

Almost surely, 2^166354451 is an apocalyptic number.

166354451 is a deficient number, since it is larger than the sum of its proper divisors (1).

166354451 is an equidigital number, since it uses as much as digits as its factorization.

166354451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43200, while the sum is 35.

The square root of 166354451 is about 12897.8467582771. The cubic root of 166354451 is about 549.9773555415.

The spelling of 166354451 in words is "one hundred sixty-six million, three hundred fifty-four thousand, four hundred fifty-one".