61667207980 has 24 divisors (see below), whose sum is σ = 148001299488. Its totient is φ = 21143042688.

The previous prime is 61667207977. The next prime is 61667208007. The reversal of 61667207980 is 8970276616.

It is a happy number.

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, 220239889 + ... + 220240168.

It is an arithmetic number, because the mean of its divisors is an integer number (6166720812).

Almost surely, 2^61667207980 is an apocalyptic number.

It is an amenable number.

61667207980 is an abundant number, since it is smaller than the sum of its proper divisors (86334091508).

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

61667207980 is a wasteful number, since it uses less digits than its factorization.

61667207980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440480073 (or 440480071 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 52.

The spelling of 61667207980 in words is "sixty-one billion, six hundred sixty-seven million, two hundred seven thousand, nine hundred eighty".