71612660 has 24 divisors (see below), whose sum is σ = 171870720. Its totient is φ = 24552864.

The previous prime is 71612641. The next prime is 71612663. The reversal of 71612660 is 6621617.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71612663) 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, 255620 + ... + 255899.

It is an arithmetic number, because the mean of its divisors is an integer number (7161280).

Almost surely, 2^71612660 is an apocalyptic number.

71612660 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

71612660 is an abundant number, since it is smaller than the sum of its proper divisors (100258060).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71612660 is a wasteful number, since it uses less digits than its factorization.

71612660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511535 (or 511533 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 71612660 is about 8462.4263660017. The cubic root of 71612660 is about 415.2694045963.

The spelling of 71612660 in words is "seventy-one million, six hundred twelve thousand, six hundred sixty".