167620881 has 4 divisors (see below), whose sum is σ = 223494512. Its totient is φ = 111747252.

The previous prime is 167620877. The next prime is 167620883. The reversal of 167620881 is 188026761.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 167620881 - 2² = 167620877 is a prime.

It is a super-2 number, since 2×167620881² = 56193519494432322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (167620883) 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, 27936811 + ... + 27936816.

It is an arithmetic number, because the mean of its divisors is an integer number (55873628).

Almost surely, 2^167620881 is an apocalyptic number.

It is an amenable number.

167620881 is a deficient number, since it is larger than the sum of its proper divisors (55873631).

167620881 is an equidigital number, since it uses as much as digits as its factorization.

167620881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55873630.

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 167620881 is about 12946.8483037379. The cubic root of 167620881 is about 551.3694589447.

The spelling of 167620881 in words is "one hundred sixty-seven million, six hundred twenty thousand, eight hundred eighty-one".