64660142 has 4 divisors (see below), whose sum is σ = 96990216. Its totient is φ = 32330070.

The previous prime is 64660133. The next prime is 64660151. The reversal of 64660142 is 24106646.

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

It is an interprime number because it is at equal distance from previous prime (64660133) and next prime (64660151).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16165034 + ... + 16165037.

It is an arithmetic number, because the mean of its divisors is an integer number (24247554).

Almost surely, 2^64660142 is an apocalyptic number.

64660142 is a deficient number, since it is larger than the sum of its proper divisors (32330074).

64660142 is a wasteful number, since it uses less digits than its factorization.

64660142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32330073.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 64660142 is about 8041.1530267742. The cubic root of 64660142 is about 401.3705941486.

Adding to 64660142 its reverse (24106646), we get a palindrome (88766788).

The spelling of 64660142 in words is "sixty-four million, six hundred sixty thousand, one hundred forty-two".