699967620 has 144 divisors (see below), whose sum is σ = 2324282688. Its totient is φ = 169102080.

The previous prime is 699967613. The next prime is 699967627. The reversal of 699967620 is 26769996.

It is a happy number.

699967620 is a `hidden beast` number, since 6 + 9 + 9 + 9 + 6 + 7 + 620 = 666.

It is an interprime number because it is at equal distance from previous prime (699967613) and next prime (699967627).

It is not an unprimeable number, because it can be changed into a prime (699967627) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 924282 + ... + 925038.

It is an arithmetic number, because the mean of its divisors is an integer number (16140852).

Almost surely, 2^699967620 is an apocalyptic number.

699967620 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 699967620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1162141344).

699967620 is an abundant number, since it is smaller than the sum of its proper divisors (1624315068).

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

699967620 is a wasteful number, since it uses less digits than its factorization.

699967620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1250 (or 1245 counting only the distinct ones).

The product of its (nonzero) digits is 2204496, while the sum is 54.

The square root of 699967620 is about 26456.9011790875. The cubic root of 699967620 is about 887.8903108974.

The spelling of 699967620 in words is "six hundred ninety-nine million, nine hundred sixty-seven thousand, six hundred twenty".