71620761 has 16 divisors (see below), whose sum is σ = 96712704. Its totient is φ = 47142144.

The previous prime is 71620751. The next prime is 71620777. The reversal of 71620761 is 16702617.

It is a happy number.

It is not a de Polignac number, because 71620761 - 2⁹ = 71620249 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (71620751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120481 + ... + 121073.

It is an arithmetic number, because the mean of its divisors is an integer number (6044544).

Almost surely, 2^71620761 is an apocalyptic number.

It is an amenable number.

71620761 is a deficient number, since it is larger than the sum of its proper divisors (25091943).

71620761 is a wasteful number, since it uses less digits than its factorization.

71620761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1040.

The product of its (nonzero) digits is 3528, while the sum is 30.

The square root of 71620761 is about 8462.9049976943. The cubic root of 71620761 is about 415.2850627709.

The spelling of 71620761 in words is "seventy-one million, six hundred twenty thousand, seven hundred sixty-one".