642466004 has 6 divisors (see below), whose sum is σ = 1124315514. Its totient is φ = 321233000.

The previous prime is 642466003. The next prime is 642466009. The reversal of 642466004 is 400664246.

It can be written as a sum of positive squares in only one way, i.e., 604668100 + 37797904 = 24590^2 + 6148^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642466003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80308247 + ... + 80308254.

It is an arithmetic number, because the mean of its divisors is an integer number (187385919).

Almost surely, 2^642466004 is an apocalyptic number.

It is an amenable number.

642466004 is a deficient number, since it is larger than the sum of its proper divisors (481849510).

642466004 is a wasteful number, since it uses less digits than its factorization.

642466004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160616505 (or 160616503 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 32.

The square root of 642466004 is about 25346.9131059386. The cubic root of 642466004 is about 862.8793000622.

The spelling of 642466004 in words is "six hundred forty-two million, four hundred sixty-six thousand, four".