166098278 has 4 divisors (see below), whose sum is σ = 249147420. Its totient is φ = 83049138.

The previous prime is 166098277. The next prime is 166098281. The reversal of 166098278 is 872890661.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166098271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41524568 + ... + 41524571.

It is an arithmetic number, because the mean of its divisors is an integer number (62286855).

Almost surely, 2^166098278 is an apocalyptic number.

166098278 is a deficient number, since it is larger than the sum of its proper divisors (83049142).

166098278 is an equidigital number, since it uses as much as digits as its factorization.

166098278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83049141.

The product of its (nonzero) digits is 290304, while the sum is 47.

The square root of 166098278 is about 12887.9120884649. The cubic root of 166098278 is about 549.6949029636.

The spelling of 166098278 in words is "one hundred sixty-six million, ninety-eight thousand, two hundred seventy-eight".