166978753 has 2 divisors, whose sum is σ = 166978754. Its totient is φ = 166978752.

The previous prime is 166978739. The next prime is 166978841. The reversal of 166978753 is 357879661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99361024 + 67617729 = 9968^2 + 8223^2 .

It is a cyclic number.

It is not a de Polignac number, because 166978753 - 2¹³ = 166970561 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166978753.

It is not a weakly prime, because it can be changed into another prime (166978153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83489376 + 83489377.

It is an arithmetic number, because the mean of its divisors is an integer number (83489377).

Almost surely, 2^166978753 is an apocalyptic number.

It is an amenable number.

166978753 is a deficient number, since it is larger than the sum of its proper divisors (1).

166978753 is an equidigital number, since it uses as much as digits as its factorization.

166978753 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1905120, while the sum is 52.

The square root of 166978753 is about 12922.0258860598. The cubic root of 166978753 is about 550.6644894274.

The spelling of 166978753 in words is "one hundred sixty-six million, nine hundred seventy-eight thousand, seven hundred fifty-three".