166377803 has 4 divisors (see below), whose sum is σ = 166425168. Its totient is φ = 166330440.

The previous prime is 166377797. The next prime is 166377811. The reversal of 166377803 is 308773661.

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

It is a cyclic number.

It is not a de Polignac number, because 166377803 - 2¹² = 166373707 is a prime.

It is a super-2 number, since 2×166377803² = 55363146662213618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166377823) 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, 17951 + ... + 25592.

It is an arithmetic number, because the mean of its divisors is an integer number (41606292).

Almost surely, 2^166377803 is an apocalyptic number.

166377803 is a deficient number, since it is larger than the sum of its proper divisors (47365).

166377803 is an equidigital number, since it uses as much as digits as its factorization.

166377803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47364.

The product of its (nonzero) digits is 127008, while the sum is 41.

The square root of 166377803 is about 12898.7519938946. The cubic root of 166377803 is about 550.0030886879.

The spelling of 166377803 in words is "one hundred sixty-six million, three hundred seventy-seven thousand, eight hundred three".