64622066402 has 4 divisors (see below), whose sum is σ = 96933099606. Its totient is φ = 32311033200.

The previous prime is 64622066389. The next prime is 64622066407. The reversal of 64622066402 is 20466022646.

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., 41481876241 + 23140190161 = 203671^2 + 152119^2 .

It is a super-2 number, since 2×64622066402² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64622066407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16155516599 + ... + 16155516602.

Almost surely, 2^64622066402 is an apocalyptic number.

64622066402 is a deficient number, since it is larger than the sum of its proper divisors (32311033204).

64622066402 is a wasteful number, since it uses less digits than its factorization.

64622066402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32311033203.

The product of its (nonzero) digits is 165888, while the sum is 38.

The spelling of 64622066402 in words is "sixty-four billion, six hundred twenty-two million, sixty-six thousand, four hundred two".