70016691 has 16 divisors (see below), whose sum is σ = 100928000. Its totient is φ = 43024608.

The previous prime is 70016671. The next prime is 70016707. The reversal of 70016691 is 19661007.

It is a de Polignac number, because none of the positive numbers 2^k-70016691 is a prime.

It is not an unprimeable number, because it can be changed into a prime (70016641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14491 + ... + 18708.

It is an arithmetic number, because the mean of its divisors is an integer number (6308000).

Almost surely, 2^70016691 is an apocalyptic number.

70016691 is a deficient number, since it is larger than the sum of its proper divisors (30911309).

70016691 is a wasteful number, since it uses less digits than its factorization.

70016691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33258.

The product of its (nonzero) digits is 2268, while the sum is 30.

The square root of 70016691 is about 8367.5976839234. The cubic root of 70016691 is about 412.1612837458.

Adding to 70016691 its reverse (19661007), we get a palindrome (89677698).

It can be divided in two parts, 70016 and 691, that added together give a palindrome (70707).

The spelling of 70016691 in words is "seventy million, sixteen thousand, six hundred ninety-one".