64220967 has 12 divisors (see below), whose sum is σ = 92963520. Its totient is φ = 42721728.

The previous prime is 64220939. The next prime is 64220977. The reversal of 64220967 is 76902246.

It is a happy number.

64220967 is a `hidden beast` number, since 642 + 2 + 0 + 9 + 6 + 7 = 666.

It is not a de Polignac number, because 64220967 - 2⁶ = 64220903 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64220927) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3138 + ... + 11759.

It is an arithmetic number, because the mean of its divisors is an integer number (7746960).

Almost surely, 2^64220967 is an apocalyptic number.

64220967 is a deficient number, since it is larger than the sum of its proper divisors (28742553).

64220967 is a wasteful number, since it uses less digits than its factorization.

64220967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15382 (or 15379 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 64220967 is about 8013.7985375226. The cubic root of 64220967 is about 400.4598191300.

It can be divided in two parts, 642 and 20967, that added together give a square (21609 = 147²).

The spelling of 64220967 in words is "sixty-four million, two hundred twenty thousand, nine hundred sixty-seven".