690866496 has 168 divisors, whose sum is σ = 2121310464. Its totient is φ = 222704640.

The previous prime is 690866483. The next prime is 690866503. The reversal of 690866496 is 694668096.

It is a happy number.

690866496 is a `hidden beast` number, since 6 + 90 + 8 + 66 + 496 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 481396 + ... + 482828.

It is an arithmetic number, because the mean of its divisors is an integer number (12626848).

Almost surely, 2^690866496 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 690866496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1060655232).

690866496 is an abundant number, since it is smaller than the sum of its proper divisors (1430443968).

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

690866496 is a wasteful number, since it uses less digits than its factorization.

690866496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1491 (or 1469 counting only the distinct ones).

The product of its (nonzero) digits is 3359232, while the sum is 54.

The square root of 690866496 is about 26284.3393677680. The cubic root of 690866496 is about 884.0253331806.

The spelling of 690866496 in words is "six hundred ninety million, eight hundred sixty-six thousand, four hundred ninety-six".