672694786 has 4 divisors (see below), whose sum is σ = 1009042182. Its totient is φ = 336347392.

The previous prime is 672694741. The next prime is 672694801. The reversal of 672694786 is 687496276.

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

It can be written as a sum of positive squares in only one way, i.e., 646735761 + 25959025 = 25431^2 + 5095^2 .

It is a super-2 number, since 2×672694786² = 905036550223171592, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 168173695 + ... + 168173698.

Almost surely, 2^672694786 is an apocalyptic number.

672694786 is a deficient number, since it is larger than the sum of its proper divisors (336347396).

672694786 is a wasteful number, since it uses less digits than its factorization.

672694786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336347395.

The product of its digits is 6096384, while the sum is 55.

The square root of 672694786 is about 25936.3603074911. The cubic root of 672694786 is about 876.2055919180.

The spelling of 672694786 in words is "six hundred seventy-two million, six hundred ninety-four thousand, seven hundred eighty-six".