167603661 has 28 divisors (see below), whose sum is σ = 255477820. Its totient is φ = 109874880.

The previous prime is 167603659. The next prime is 167603671. The reversal of 167603661 is 166306761.

It can be written as a sum of positive squares in 2 ways, for example, as 63441225 + 104162436 = 7965^2 + 10206^2 .

It is not a de Polignac number, because 167603661 - 2¹ = 167603659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (167603641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 42585 + ... + 46353.

Almost surely, 2^167603661 is an apocalyptic number.

It is an amenable number.

167603661 is a deficient number, since it is larger than the sum of its proper divisors (87874159).

167603661 is an frugal number, since it uses more digits than its factorization.

167603661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3848 (or 3833 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 167603661 is about 12946.1832599419. The cubic root of 167603661 is about 551.3505772334.

The spelling of 167603661 in words is "one hundred sixty-seven million, six hundred three thousand, six hundred sixty-one".