64986867 has 20 divisors (see below), whose sum is σ = 105905976. Its totient is φ = 39385440.

The previous prime is 64986847. The next prime is 64986877. The reversal of 64986867 is 76868946.

It is not a de Polignac number, because 64986867 - 2²³ = 56598259 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64986827) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 35578 + ... + 37359.

Almost surely, 2^64986867 is an apocalyptic number.

64986867 is a deficient number, since it is larger than the sum of its proper divisors (40919109).

64986867 is a wasteful number, since it uses less digits than its factorization.

64986867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72960 (or 72951 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 54.

The square root of 64986867 is about 8061.4432330694. The cubic root of 64986867 is about 402.0454949625.

The spelling of 64986867 in words is "sixty-four million, nine hundred eighty-six thousand, eight hundred sixty-seven".