670642247 has 4 divisors (see below), whose sum is σ = 731609736. Its totient is φ = 609674760.

The previous prime is 670642223. The next prime is 670642261. The reversal of 670642247 is 742246076.

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

It is a cyclic number.

It is not a de Polignac number, because 670642247 - 2²⁶ = 603533383 is a prime.

It is a super-2 number, since 2×670642247² = 899522046922418018, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 670642247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670642267) 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, 30483728 + ... + 30483749.

It is an arithmetic number, because the mean of its divisors is an integer number (182902434).

Almost surely, 2^670642247 is an apocalyptic number.

670642247 is a deficient number, since it is larger than the sum of its proper divisors (60967489).

670642247 is a wasteful number, since it uses less digits than its factorization.

670642247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60967488.

The product of its (nonzero) digits is 112896, while the sum is 38.

The square root of 670642247 is about 25896.7613226056. The cubic root of 670642247 is about 875.3135189973.

The spelling of 670642247 in words is "six hundred seventy million, six hundred forty-two thousand, two hundred forty-seven".