55779967 has 8 divisors (see below), whose sum is σ = 57395520. Its totient is φ = 54176640.

The previous prime is 55779923. The next prime is 55779989. The reversal of 55779967 is 76997755.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55779967 is a prime.

It is a super-2 number, since 2×55779967² = 6222809437042178, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55779917) 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, 6634 + ... + 12472.

It is an arithmetic number, because the mean of its divisors is an integer number (7174440).

Almost surely, 2^55779967 is an apocalyptic number.

55779967 is a deficient number, since it is larger than the sum of its proper divisors (1615553).

55779967 is a wasteful number, since it uses less digits than its factorization.

55779967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6113.

The product of its digits is 4167450, while the sum is 55.

The square root of 55779967 is about 7468.5987306857. The cubic root of 55779967 is about 382.0844979055.

The spelling of 55779967 in words is "fifty-five million, seven hundred seventy-nine thousand, nine hundred sixty-seven".