64670871 has 16 divisors (see below), whose sum is σ = 90996480. Its totient is φ = 40772160.

The previous prime is 64670843. The next prime is 64670891. The reversal of 64670871 is 17807646.

It is not a de Polignac number, because 64670871 - 2⁶ = 64670807 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64670831) 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, 876 + ... + 11406.

It is an arithmetic number, because the mean of its divisors is an integer number (5687280).

Almost surely, 2^64670871 is an apocalyptic number.

64670871 is a deficient number, since it is larger than the sum of its proper divisors (26325609).

64670871 is a wasteful number, since it uses less digits than its factorization.

64670871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10646.

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 64670871 is about 8041.8201297965. The cubic root of 64670871 is about 401.3927926097.

It can be divided in two parts, 646 and 70871, that added together give a palindrome (71517).

The spelling of 64670871 in words is "sixty-four million, six hundred seventy thousand, eight hundred seventy-one".