67991201001 has 6 divisors (see below), whose sum is σ = 98209512570. Its totient is φ = 45327467328.

The previous prime is 67991200973. The next prime is 67991201023. The reversal of 67991201001 is 10010219976.

It can be written as a sum of positive squares in only one way, i.e., 67664495376 + 326705625 = 260124^2 + 18075^2 .

It is not a de Polignac number, because 67991201001 - 2⁵ = 67991200969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (67991201801) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3777288936 + ... + 3777288953.

It is an arithmetic number, because the mean of its divisors is an integer number (16368252095).

Almost surely, 2^67991201001 is an apocalyptic number.

It is an amenable number.

67991201001 is a deficient number, since it is larger than the sum of its proper divisors (30218311569).

67991201001 is a wasteful number, since it uses less digits than its factorization.

67991201001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7554577895 (or 7554577892 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 36.

The spelling of 67991201001 in words is "sixty-seven billion, nine hundred ninety-one million, two hundred one thousand, one".