670991692 has 24 divisors (see below), whose sum is σ = 1369373600. Its totient is φ = 287567280.

The previous prime is 670991641. The next prime is 670991701. The reversal of 670991692 is 296199076.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 243159 + ... + 245902.

Almost surely, 2^670991692 is an apocalyptic number.

It is an amenable number.

670991692 is an abundant number, since it is smaller than the sum of its proper divisors (698381908).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

670991692 is a wasteful number, since it uses less digits than its factorization.

670991692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489086 (or 489070 counting only the distinct ones).

The product of its (nonzero) digits is 367416, while the sum is 49.

The square root of 670991692 is about 25903.5073300895. The cubic root of 670991692 is about 875.4655229523.

The spelling of 670991692 in words is "six hundred seventy million, nine hundred ninety-one thousand, six hundred ninety-two".