166720274 has 16 divisors (see below), whose sum is σ = 289251648. Its totient is φ = 70590192.

The previous prime is 166720243. The next prime is 166720291. The reversal of 166720274 is 472027661.

It is a super-3 number, since 3×166720274³ (a number of 26 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70577 + ... + 72900.

It is an arithmetic number, because the mean of its divisors is an integer number (18078228).

Almost surely, 2^166720274 is an apocalyptic number.

166720274 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

166720274 is a deficient number, since it is larger than the sum of its proper divisors (122531374).

166720274 is a wasteful number, since it uses less digits than its factorization.

166720274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143569.

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 166720274 is about 12912.0205235277. The cubic root of 166720274 is about 550.3802043292.

The spelling of 166720274 in words is "one hundred sixty-six million, seven hundred twenty thousand, two hundred seventy-four".