64638662 has 16 divisors (see below), whose sum is σ = 106069392. Its totient is φ = 29298720.

The previous prime is 64638661. The next prime is 64638697. The reversal of 64638662 is 26683646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64638661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4268 + ... + 12144.

It is an arithmetic number, because the mean of its divisors is an integer number (6629337).

Almost surely, 2^64638662 is an apocalyptic number.

64638662 is a deficient number, since it is larger than the sum of its proper divisors (41430730).

64638662 is a wasteful number, since it uses less digits than its factorization.

64638662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8263.

The product of its digits is 248832, while the sum is 41.

The square root of 64638662 is about 8039.8172864811. The cubic root of 64638662 is about 401.3261443276.

The spelling of 64638662 in words is "sixty-four million, six hundred thirty-eight thousand, six hundred sixty-two".