6738661940 has 12 divisors (see below), whose sum is σ = 14151190116. Its totient is φ = 2695464768.

The previous prime is 6738661939. The next prime is 6738661957. The reversal of 6738661940 is 491668376.

It can be written as a sum of positive squares in 2 ways, for example, as 5132576164 + 1606085776 = 71642^2 + 40076^2 .

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168466529 + ... + 168466568.

It is an arithmetic number, because the mean of its divisors is an integer number (1179265843).

Almost surely, 2^6738661940 is an apocalyptic number.

It is an amenable number.

6738661940 is an abundant number, since it is smaller than the sum of its proper divisors (7412528176).

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

6738661940 is a wasteful number, since it uses less digits than its factorization.

6738661940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336933106 (or 336933104 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 50.

The square root of 6738661940 is about 82089.3533900712. The cubic root of 6738661940 is about 1888.8228291981.

The spelling of 6738661940 in words is "six billion, seven hundred thirty-eight million, six hundred sixty-one thousand, nine hundred forty".