70661660 has 24 divisors (see below), whose sum is σ = 148633296. Its totient is φ = 28218240.

The previous prime is 70661659. The next prime is 70661663. The reversal of 70661660 is 6616607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70661663) 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, 11264 + ... + 16376.

It is an arithmetic number, because the mean of its divisors is an integer number (6193054).

Almost surely, 2^70661660 is an apocalyptic number.

It is an amenable number.

70661660 is an abundant number, since it is smaller than the sum of its proper divisors (77971636).

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

70661660 is a wasteful number, since it uses less digits than its factorization.

70661660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5813 (or 5811 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 70661660 is about 8406.0490124672. The cubic root of 70661660 is about 413.4229788794.

The spelling of 70661660 in words is "seventy million, six hundred sixty-one thousand, six hundred sixty".