64460666642 has 4 divisors (see below), whose sum is σ = 96690999966. Its totient is φ = 32230333320.

The previous prime is 64460666609. The next prime is 64460666671. The reversal of 64460666642 is 24666606446.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 44757210481 + 19703456161 = 211559^2 + 140369^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16115166659 + ... + 16115166662.

Almost surely, 2^64460666642 is an apocalyptic number.

64460666642 is a deficient number, since it is larger than the sum of its proper divisors (32230333324).

64460666642 is a wasteful number, since it uses less digits than its factorization.

64460666642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32230333323.

The product of its (nonzero) digits is 5971968, while the sum is 50.

The spelling of 64460666642 in words is "sixty-four billion, four hundred sixty million, six hundred sixty-six thousand, six hundred forty-two".