697778466 has 32 divisors (see below), whose sum is σ = 1739916288. Its totient is φ = 181241040.

The previous prime is 697778461. The next prime is 697778489. The reversal of 697778466 is 664877796.

It is a super-2 number, since 2×697778466² = 973789575226626312, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (697778461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 754710 + ... + 755633.

It is an arithmetic number, because the mean of its divisors is an integer number (54372384).

Almost surely, 2^697778466 is an apocalyptic number.

697778466 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

697778466 is an abundant number, since it is smaller than the sum of its proper divisors (1042137822).

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

697778466 is a wasteful number, since it uses less digits than its factorization.

697778466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1510366.

The product of its digits is 21337344, while the sum is 60.

The square root of 697778466 is about 26415.4967017469. The cubic root of 697778466 is about 886.9637163711.

The spelling of 697778466 in words is "six hundred ninety-seven million, seven hundred seventy-eight thousand, four hundred sixty-six".