70691651 has 4 divisors (see below), whose sum is σ = 70744512. Its totient is φ = 70638792.

The previous prime is 70691641. The next prime is 70691653. The reversal of 70691651 is 15619607.

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 70691651 - 2⁶ = 70691587 is a prime.

It is a super-2 number, since 2×70691651² = 9994619042211602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70691653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24371 + ... + 27116.

It is an arithmetic number, because the mean of its divisors is an integer number (17686128).

Almost surely, 2^70691651 is an apocalyptic number.

70691651 is a deficient number, since it is larger than the sum of its proper divisors (52861).

70691651 is a wasteful number, since it uses less digits than its factorization.

70691651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52860.

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 70691651 is about 8407.8327171751. The cubic root of 70691651 is about 413.4814604511.

The spelling of 70691651 in words is "seventy million, six hundred ninety-one thousand, six hundred fifty-one".