67606749864 has 24 divisors (see below), whose sum is σ = 183101614410. Its totient is φ = 22535583264.

The previous prime is 67606749857. The next prime is 67606749883. The reversal of 67606749864 is 46894760676.

It can be written as a sum of positive squares in only one way, i.e., 64948522500 + 2658227364 = 254850^2 + 51558^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-3 number, since 3×67606749864³ (a number of 33 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 469491247 + ... + 469491390.

Almost surely, 2^67606749864 is an apocalyptic number.

It is an amenable number.

67606749864 is an abundant number, since it is smaller than the sum of its proper divisors (115494864546).

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

67606749864 is a wasteful number, since it uses less digits than its factorization.

67606749864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 938982649 (or 938982642 counting only the distinct ones).

The product of its (nonzero) digits is 73156608, while the sum is 63.

The spelling of 67606749864 in words is "sixty-seven billion, six hundred six million, seven hundred forty-nine thousand, eight hundred sixty-four".