671661120 has 112 divisors (see below), whose sum is σ = 2296607040. Its totient is φ = 165328896.

The previous prime is 671661071. The next prime is 671661127. The reversal of 671661120 is 21166176.

It is a super-2 number, since 2×671661120² = 902257320239308800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (671661127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14430 + ... + 39389.

It is an arithmetic number, because the mean of its divisors is an integer number (20505420).

Almost surely, 2^671661120 is an apocalyptic number.

671661120 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

671661120 is an abundant number, since it is smaller than the sum of its proper divisors (1624945920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

671661120 is a wasteful number, since it uses less digits than its factorization.

671661120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53852 (or 53842 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 671661120 is about 25916.4256794798. The cubic root of 671661120 is about 875.7565679586.

It can be divided in two parts, 67166 and 1120, that added together give a palindrome (68286).

The spelling of 671661120 in words is "six hundred seventy-one million, six hundred sixty-one thousand, one hundred twenty".