671777470 has 32 divisors (see below), whose sum is σ = 1488247488. Its totient is φ = 212606208.

The previous prime is 671777467. The next prime is 671777473. The reversal of 671777470 is 74777176.

It is an interprime number because it is at equal distance from previous prime (671777467) and next prime (671777473).

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 671777470.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671777473) 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, 368199 + ... + 370018.

It is an arithmetic number, because the mean of its divisors is an integer number (46507734).

Almost surely, 2^671777470 is an apocalyptic number.

671777470 is an abundant number, since it is smaller than the sum of its proper divisors (816470018).

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

671777470 is a wasteful number, since it uses less digits than its factorization.

671777470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 738244.

The product of its (nonzero) digits is 403368, while the sum is 46.

The square root of 671777470 is about 25918.6702976831. The cubic root of 671777470 is about 875.8071333358.

It can be divided in two parts, 67177 and 7470, that added together give a palindrome (74647).

The spelling of 671777470 in words is "six hundred seventy-one million, seven hundred seventy-seven thousand, four hundred seventy".