428965166626 has 4 divisors (see below), whose sum is σ = 643447749942. Its totient is φ = 214482583312.

The previous prime is 428965166521. The next prime is 428965166639. The reversal of 428965166626 is 626661569824.

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., 263116676601 + 165848490025 = 512949^2 + 407245^2 .

It is a super-2 number, since 2×428965166626² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107241291655 + ... + 107241291658.

Almost surely, 2^428965166626 is an apocalyptic number.

428965166626 is a deficient number, since it is larger than the sum of its proper divisors (214482583316).

428965166626 is a wasteful number, since it uses less digits than its factorization.

428965166626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214482583315.

The product of its digits is 44789760, while the sum is 61.

The spelling of 428965166626 in words is "four hundred twenty-eight billion, nine hundred sixty-five million, one hundred sixty-six thousand, six hundred twenty-six".