166661962 has 8 divisors (see below), whose sum is σ = 250064100. Its totient is φ = 83307264.

The previous prime is 166661951. The next prime is 166661969. The reversal of 166661962 is 269166661.

It can be written as a sum of positive squares in 2 ways, for example, as 165405321 + 1256641 = 12861^2 + 1121^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (166661969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1137 + ... + 18292.

Almost surely, 2^166661962 is an apocalyptic number.

166661962 is a deficient number, since it is larger than the sum of its proper divisors (83402138).

166661962 is a wasteful number, since it uses less digits than its factorization.

166661962 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23720.

The product of its digits is 139968, while the sum is 43.

The square root of 166661962 is about 12909.7622751157. The cubic root of 166661962 is about 550.3160299447.

It can be divided in two parts, 1666619 and 62, that added together give a square (1666681 = 1291²).

The spelling of 166661962 in words is "one hundred sixty-six million, six hundred sixty-one thousand, nine hundred sixty-two".