71257669 has 8 divisors (see below), whose sum is σ = 84245760. Its totient is φ = 58971696.

The previous prime is 71257633. The next prime is 71257679. The reversal of 71257669 is 96675217.

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

It is not a de Polignac number, because 71257669 - 2⁹ = 71257157 is a prime.

It is a super-2 number, since 2×71257669² = 10155310782627122, 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 (71257679) 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, 175309 + ... + 175714.

It is an arithmetic number, because the mean of its divisors is an integer number (10530720).

Almost surely, 2^71257669 is an apocalyptic number.

It is an amenable number.

71257669 is a deficient number, since it is larger than the sum of its proper divisors (12988091).

71257669 is a wasteful number, since it uses less digits than its factorization.

71257669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351059.

The product of its digits is 158760, while the sum is 43.

The square root of 71257669 is about 8441.4257681982. The cubic root of 71257669 is about 414.5820905518.

The spelling of 71257669 in words is "seventy-one million, two hundred fifty-seven thousand, six hundred sixty-nine".