61887660 has 24 divisors (see below), whose sum is σ = 173285616. Its totient is φ = 16503360.

The previous prime is 61887659. The next prime is 61887689. The reversal of 61887660 is 6678816.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 515671 + ... + 515790.

It is an arithmetic number, because the mean of its divisors is an integer number (7220234).

Almost surely, 2^61887660 is an apocalyptic number.

61887660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61887660 is an abundant number, since it is smaller than the sum of its proper divisors (111397956).

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

61887660 is a wasteful number, since it uses less digits than its factorization.

61887660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1031473 (or 1031471 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 61887660 is about 7866.8710425429. The cubic root of 61887660 is about 395.5499683010.

The spelling of 61887660 in words is "sixty-one million, eight hundred eighty-seven thousand, six hundred sixty".