647667465 has 16 divisors (see below), whose sum is σ = 1081323648. Its totient is φ = 330404096.

The previous prime is 647667457. The next prime is 647667481. The reversal of 647667465 is 564766746.

647667465 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 647667465 - 2³ = 647667457 is a prime.

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, 938304 + ... + 938993.

It is an arithmetic number, because the mean of its divisors is an integer number (67582728).

Almost surely, 2^647667465 is an apocalyptic number.

It is an amenable number.

647667465 is a deficient number, since it is larger than the sum of its proper divisors (433656183).

647667465 is a wasteful number, since it uses less digits than its factorization.

647667465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1877328.

The product of its digits is 5080320, while the sum is 51.

The square root of 647667465 is about 25449.3116802793. The cubic root of 647667465 is about 865.2016926403.

The spelling of 647667465 in words is "six hundred forty-seven million, six hundred sixty-seven thousand, four hundred sixty-five".