71652661 has 8 divisors (see below), whose sum is σ = 73138464. Its totient is φ = 70171920.

The previous prime is 71652653. The next prime is 71652673. The reversal of 71652661 is 16625617.

It is a happy number.

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 71652661 - 2³ = 71652653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71652631) 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, 42150 + ... + 43816.

It is an arithmetic number, because the mean of its divisors is an integer number (9142308).

Almost surely, 2^71652661 is an apocalyptic number.

It is an amenable number.

71652661 is a deficient number, since it is larger than the sum of its proper divisors (1485803).

71652661 is a wasteful number, since it uses less digits than its factorization.

71652661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2531.

The product of its digits is 15120, while the sum is 34.

The square root of 71652661 is about 8464.7894835016. The cubic root of 71652661 is about 415.3467098267.

The spelling of 71652661 in words is "seventy-one million, six hundred fifty-two thousand, six hundred sixty-one".