6420694699 has 4 divisors (see below), whose sum is σ = 6541839936. Its totient is φ = 6299549464.

The previous prime is 6420694613. The next prime is 6420694711. The reversal of 6420694699 is 9964960246.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6420694699 - 2¹⁵ = 6420661931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6420694499) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60572539 + ... + 60572644.

It is an arithmetic number, because the mean of its divisors is an integer number (1635459984).

Almost surely, 2^6420694699 is an apocalyptic number.

6420694699 is a deficient number, since it is larger than the sum of its proper divisors (121145237).

6420694699 is a wasteful number, since it uses less digits than its factorization.

6420694699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121145236.

The product of its (nonzero) digits is 5038848, while the sum is 55.

The square root of 6420694699 is about 80129.2374792123. The cubic root of 6420694699 is about 1858.6345529289.

The spelling of 6420694699 in words is "six billion, four hundred twenty million, six hundred ninety-four thousand, six hundred ninety-nine".