70640807 has 8 divisors (see below), whose sum is σ = 72732000. Its totient is φ = 68559264.

The previous prime is 70640783. The next prime is 70640837. The reversal of 70640807 is 70804607.

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

It is a cyclic number.

It is not a de Polignac number, because 70640807 - 2⁶ = 70640743 is a prime.

It is a super-2 number, since 2×70640807² = 9980247227222498, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70640837) 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, 14069 + ... + 18417.

It is an arithmetic number, because the mean of its divisors is an integer number (9091500).

Almost surely, 2^70640807 is an apocalyptic number.

70640807 is a deficient number, since it is larger than the sum of its proper divisors (2091193).

70640807 is a wasteful number, since it uses less digits than its factorization.

70640807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4825.

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 70640807 is about 8404.8085641495. The cubic root of 70640807 is about 413.3823063866.

The spelling of 70640807 in words is "seventy million, six hundred forty thousand, eight hundred seven".