1661700167 has 4 divisors (see below), whose sum is σ = 1661782536. Its totient is φ = 1661617800.

The previous prime is 1661700151. The next prime is 1661700169. The reversal of 1661700167 is 7610071661.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1661700167 - 2⁴ = 1661700151 is a prime.

It is a super-2 number, since 2×1661700167² = 5522494890015655778, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1661700169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11792 + ... + 58842.

It is an arithmetic number, because the mean of its divisors is an integer number (415445634).

Almost surely, 2^1661700167 is an apocalyptic number.

1661700167 is a deficient number, since it is larger than the sum of its proper divisors (82369).

1661700167 is an equidigital number, since it uses as much as digits as its factorization.

1661700167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82368.

The product of its (nonzero) digits is 10584, while the sum is 35.

The square root of 1661700167 is about 40763.9567142347. The cubic root of 1661700167 is about 1184.4522424654.

The spelling of 1661700167 in words is "one billion, six hundred sixty-one million, seven hundred thousand, one hundred sixty-seven".