672649906 has 8 divisors (see below), whose sum is σ = 1009303344. Its totient is φ = 336215460.

The previous prime is 672649891. The next prime is 672649907. The reversal of 672649906 is 609946276.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 672649906.

It is not an unprimeable number, because it can be changed into a prime (672649907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46840 + ... + 59491.

It is an arithmetic number, because the mean of its divisors is an integer number (126162918).

Almost surely, 2^672649906 is an apocalyptic number.

672649906 is a deficient number, since it is larger than the sum of its proper divisors (336653438).

672649906 is a wasteful number, since it uses less digits than its factorization.

672649906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109496.

The product of its (nonzero) digits is 979776, while the sum is 49.

The square root of 672649906 is about 25935.4950984168. The cubic root of 672649906 is about 876.1861056257.

The spelling of 672649906 in words is "six hundred seventy-two million, six hundred forty-nine thousand, nine hundred six".