671553508366 has 16 divisors (see below), whose sum is σ = 1084831325424. Its totient is φ = 309943738944.

The previous prime is 671553508361. The next prime is 671553508403. The reversal of 671553508366 is 663805355176.

671553508366 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×671553508366² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671553508361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2981250 + ... + 3198586.

It is an arithmetic number, because the mean of its divisors is an integer number (67801957839).

Almost surely, 2^671553508366 is an apocalyptic number.

671553508366 is a deficient number, since it is larger than the sum of its proper divisors (413277817058).

671553508366 is a wasteful number, since it uses less digits than its factorization.

671553508366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336195.

The product of its (nonzero) digits is 13608000, while the sum is 55.

The spelling of 671553508366 in words is "six hundred seventy-one billion, five hundred fifty-three million, five hundred eight thousand, three hundred sixty-six".