70640641 has 8 divisors (see below), whose sum is σ = 71984160. Its totient is φ = 69302112.

The previous prime is 70640639. The next prime is 70640653. The reversal of 70640641 is 14604607.

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 70640641 - 2¹ = 70640639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70640621) 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, 39421 + ... + 41173.

It is an arithmetic number, because the mean of its divisors is an integer number (8998020).

Almost surely, 2^70640641 is an apocalyptic number.

It is an amenable number.

70640641 is a deficient number, since it is larger than the sum of its proper divisors (1343519).

70640641 is a wasteful number, since it uses less digits than its factorization.

70640641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2495.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 70640641 is about 8404.7986888444. The cubic root of 70640641 is about 413.3819825817.

The spelling of 70640641 in words is "seventy million, six hundred forty thousand, six hundred forty-one".