690661926914 has 4 divisors (see below), whose sum is σ = 1035992890374. Its totient is φ = 345330963456.

The previous prime is 690661926847. The next prime is 690661926917. The reversal of 690661926914 is 419629166096.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 674311957225 + 16349969689 = 821165^2 + 127867^2 .

It is not an unprimeable number, because it can be changed into a prime (690661926917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172665481727 + ... + 172665481730.

Almost surely, 2^690661926914 is an apocalyptic number.

690661926914 is a deficient number, since it is larger than the sum of its proper divisors (345330963460).

690661926914 is a wasteful number, since it uses less digits than its factorization.

690661926914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345330963459.

The product of its (nonzero) digits is 7558272, while the sum is 59.

The spelling of 690661926914 in words is "six hundred ninety billion, six hundred sixty-one million, nine hundred twenty-six thousand, nine hundred fourteen".