61672778337 has 8 divisors (see below), whose sum is σ = 84142705504. Its totient is φ = 40159018368.

The previous prime is 61672778317. The next prime is 61672778359. The reversal of 61672778337 is 73387727616.

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

It is not a de Polignac number, because 61672778337 - 2⁸ = 61672778081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61672778317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 239041648 + ... + 239041905.

It is an arithmetic number, because the mean of its divisors is an integer number (10517838188).

Almost surely, 2^61672778337 is an apocalyptic number.

It is an amenable number.

61672778337 is a deficient number, since it is larger than the sum of its proper divisors (22469927167).

61672778337 is a wasteful number, since it uses less digits than its factorization.

61672778337 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478083599.

The product of its digits is 12446784, while the sum is 57.

The spelling of 61672778337 in words is "sixty-one billion, six hundred seventy-two million, seven hundred seventy-eight thousand, three hundred thirty-seven".