6446624662 has 4 divisors (see below), whose sum is σ = 9669936996. Its totient is φ = 3223312330.

The previous prime is 6446624659. The next prime is 6446624761. The reversal of 6446624662 is 2664266446.

It is a happy number.

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

It is a super-2 number, since 2×6446624662² = 83117939065413228488, which contains 22 as substring.

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, 1611656164 + ... + 1611656167.

It is an arithmetic number, because the mean of its divisors is an integer number (2417484249).

Almost surely, 2^6446624662 is an apocalyptic number.

6446624662 is a deficient number, since it is larger than the sum of its proper divisors (3223312334).

6446624662 is a wasteful number, since it uses less digits than its factorization.

6446624662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3223312333.

The product of its digits is 1990656, while the sum is 46.

The square root of 6446624662 is about 80290.8753346232. The cubic root of 6446624662 is about 1861.1332229873.

The spelling of 6446624662 in words is "six billion, four hundred forty-six million, six hundred twenty-four thousand, six hundred sixty-two".