64380667 has 16 divisors (see below), whose sum is σ = 72072000. Its totient is φ = 57101184.

The previous prime is 64380661. The next prime is 64380689. The reversal of 64380667 is 76608346.

It is a cyclic number.

It is not a de Polignac number, because 64380667 - 2⁷ = 64380539 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64380661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146434 + ... + 146872.

It is an arithmetic number, because the mean of its divisors is an integer number (4504500).

Almost surely, 2^64380667 is an apocalyptic number.

64380667 is a deficient number, since it is larger than the sum of its proper divisors (7691333).

64380667 is a wasteful number, since it uses less digits than its factorization.

64380667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870.

The product of its (nonzero) digits is 145152, while the sum is 40.

The square root of 64380667 is about 8023.7564145480. The cubic root of 64380667 is about 400.7914890796.

The spelling of 64380667 in words is "sixty-four million, three hundred eighty thousand, six hundred sixty-seven".