634447366665 has 16 divisors (see below), whose sum is σ = 1160132327808. Its totient is φ = 290033081856.

The previous prime is 634447366621. The next prime is 634447366703. The reversal of 634447366665 is 566663744436.

It is a happy number.

It is not a de Polignac number, because 634447366665 - 2⁶ = 634447366601 is a prime.

It is a super-2 number, since 2×634447366665² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 634447366599 and 634447366608.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3021177832 + ... + 3021178041.

It is an arithmetic number, because the mean of its divisors is an integer number (72508270488).

Almost surely, 2^634447366665 is an apocalyptic number.

It is an amenable number.

634447366665 is a deficient number, since it is larger than the sum of its proper divisors (525684961143).

634447366665 is a wasteful number, since it uses less digits than its factorization.

634447366665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6042355888.

The product of its digits is 156764160, while the sum is 60.

The spelling of 634447366665 in words is "six hundred thirty-four billion, four hundred forty-seven million, three hundred sixty-six thousand, six hundred sixty-five".