6938770664 has 32 divisors (see below), whose sum is σ = 15651364800. Its totient is φ = 2817244800.

The previous prime is 6938770651. The next prime is 6938770681. The reversal of 6938770664 is 4660778396.

It is a happy number.

It is a super-3 number, since 3×6938770664³ (a number of 31 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3259637 + ... + 3261764.

It is an arithmetic number, because the mean of its divisors is an integer number (489105150).

Almost surely, 2^6938770664 is an apocalyptic number.

It is an amenable number.

6938770664 is an abundant number, since it is smaller than the sum of its proper divisors (8712594136).

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

6938770664 is a wasteful number, since it uses less digits than its factorization.

6938770664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6521433 (or 6521429 counting only the distinct ones).

The product of its (nonzero) digits is 9144576, while the sum is 56.

The square root of 6938770664 is about 83299.2836943992. The cubic root of 6938770664 is about 1907.3373407697.

The spelling of 6938770664 in words is "six billion, nine hundred thirty-eight million, seven hundred seventy thousand, six hundred sixty-four".