64642466 has 64 divisors (see below), whose sum is σ = 125452800. Its totient is φ = 24837120.

The previous prime is 64642463. The next prime is 64642469. The reversal of 64642466 is 66424646.

It is an interprime number because it is at equal distance from previous prime (64642463) and next prime (64642469).

It is a super-2 number, since 2×64642466² = 8357296821122312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64642463) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 268106 + ... + 268346.

It is an arithmetic number, because the mean of its divisors is an integer number (1960200).

Almost surely, 2^64642466 is an apocalyptic number.

64642466 is a deficient number, since it is larger than the sum of its proper divisors (60810334).

64642466 is a wasteful number, since it uses less digits than its factorization.

64642466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304 (or 290 counting only the distinct ones).

The product of its digits is 165888, while the sum is 38.

The square root of 64642466 is about 8040.0538555410. The cubic root of 64642466 is about 401.3340168848.

The spelling of 64642466 in words is "sixty-four million, six hundred forty-two thousand, four hundred sixty-six".