640070007 has 8 divisors (see below), whose sum is σ = 873273984. Its totient is φ = 416789688.

The previous prime is 640069979. The next prime is 640070047. The reversal of 640070007 is 700070046.

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

It is not a de Polignac number, because 640070007 - 2⁶ = 640069943 is a prime.

It is a super-2 number, since 2×640070007² = 819379227721960098, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640070047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2480763 + ... + 2481020.

It is an arithmetic number, because the mean of its divisors is an integer number (109159248).

Almost surely, 2^640070007 is an apocalyptic number.

640070007 is a deficient number, since it is larger than the sum of its proper divisors (233203977).

640070007 is a wasteful number, since it uses less digits than its factorization.

640070007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4961829.

The product of its (nonzero) digits is 1176, while the sum is 24.

The square root of 640070007 is about 25299.6048783375. The cubic root of 640070007 is about 861.8052968482.

The spelling of 640070007 in words is "six hundred forty million, seventy thousand, seven".