671020651 has 24 divisors (see below), whose sum is σ = 842140800. Its totient is φ = 531078912.

The previous prime is 671020643. The next prime is 671020687. The reversal of 671020651 is 156020176.

It is not a de Polignac number, because 671020651 - 2³ = 671020643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (671020621) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36550 + ... + 51748.

It is an arithmetic number, because the mean of its divisors is an integer number (35089200).

Almost surely, 2^671020651 is an apocalyptic number.

671020651 is a deficient number, since it is larger than the sum of its proper divisors (171120149).

671020651 is a wasteful number, since it uses less digits than its factorization.

671020651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15283 (or 15276 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 671020651 is about 25904.0663024167. The cubic root of 671020651 is about 875.4781173663.

The spelling of 671020651 in words is "six hundred seventy-one million, twenty thousand, six hundred fifty-one".